Medium of immediacy: The Prussian counting card

At the core of Prussia’s fundamental reconfiguration of the census survey in 1871 was a new paper form, the Prussian counting card (Zählkarte, see figure 2). Printed on heavy-duty paper and cut to a handy size, the counting cards differed from enumeration lists used in most other nations’ census efforts in two significant ways. First, the counting card contained all questions to be answered by each person on a single, standalone page. The new paper tool represented a radical departure from customary enumeration lists, such as the ones used for the American census. These were bound lists that provided a fixed grid in which individual particulars were recorded line by line (See figure 3). By contrast, the Prussian counting card, once filled in, represented a complete, movable data set representing one individual (see figure 2).

Figure 2. Prussian counting card (21 x 12 cm) used for the census of 1871. The card represents a moveable data set of one individual. GStA PK, HA I, Rep. 77, Tit. 94, no. 132, vol. 1, 202.

Figure 3. American enumeration list from the 1880 census, Rariton Township, New Jersey. In this bound list, entries for each person are noted line by line. Wikimedia Commons.

This property of the counting card accounted for a second major deviation from established enumeration procedures. Prussian counting cards served to gather the required information at people’s homes, but they were then also used to sort, count, and compile the particulars inscribed on them, so that the processing of the data into numbers and statistical aggregates was accomplished without any further transfer of the original information inscribed on each card. Prussian census officials hailed these multipurpose features of their mobile cards as superior to any other method, as no tedious and error-prone transfers of the collected information onto intermediary carriers were required before the data could be compiled.Footnote ³ The Prussian paper tool made it possible to compile the data that had been gathered without such fickle, time-consuming, and expensive transcriptions. For this reason, Berlin’s statisticians lauded the counting card as the foundation for producing quantitative depictions of the populace based on aggregates in a way that was not only the fastest and cheapest, but also the most reliable (Engel Reference Engel1870, 40).

In their zeal to create the most accurate population statistics that had ever been achieved, Prussian census officials insisted it was key to implement a seamless process, with as little human interference as possible, that would prevent errors from creeping in and distorting the data. This imperative applied in particular to the point of data entry in each home, which posed the biggest hazard of the whole endeavor. To safeguard the harvest of unbiased information, Prussian statisticians envisioned a specific scenario, in which the heads of household would perform the act of responding to the questions by interacting directly with the forms. This did not mean that enumerators were no longer needed, but they were pushed from the center to the sidelines of inscription, where they acquired a new role as enablers, controllers, and authenticators rather than as actors in the entry of data. They were expected to deliver and then later collect the enumeration material from each household.

Usually, the census took place in the early days of December, when things were slowing down and people could be expected to be at home. The counting letters were delivered to each household one or two days before they were to be collected, so that the forms would not stay out of official reach for too long. Ideally, the pick-up was scheduled after a Sunday, because “usually then all members of the household are together and also have time to discuss the business of filling in the cards” (Engel Reference Engel1861, 166). Self-inscription by counting card was thus not meant to happen in solitude. But it was envisioned as being solely mediated by the form’s interface and undisturbed by the census’s human envoy. The envoy would nevertheless reappear on the scene—not only to collect the filled-in forms, but also to check on the spot what had been noted down, to correct errors, and to complete omissions. This act of verification, reinforced through a second proof run by the local authorities, turned each card into an authenticated official record carrying precious Ur-data.

The procedure followed long-established bureaucratic practices of authentication (Vismann, Reference Vismann2011, Stollberg-Rillinger and Krischer, Reference Stollberg-Rillinger and Krischer2010). However, in the context of the carefully thought-out setting in which personal data was to be acquired for the 1871 census, the meaning of official testimony became epistemically relevant in new ways. People’s hand-written data entries were verified not unlike inscriptions in scientific experimentation in the laboratories of the day, where a strictly controlled process, secured by technical means, testimonies, and error calculations, became the safeguard for generating accurate data (Rheinberger Reference Rheinberger2011; Latour Reference Latour1987; Fischer et al., Reference Fischer, Gabriele Gramelsberger, Rheinberger and Rickli2021).

Self-inscription implied a major shift in bureaucratic communication: blank forms had mostly been used for internal administrative purposes, or consigned to agents of state power, such as enumerators.Footnote ⁴ The new questionnaires therefore marked a turning point in that the form became a medium of direct contact between the state and its subjects in their own homes. The card itself was purposefully designed to serve this function. Its header asked for locality, street address, and three numbers to identify each card—metadata that were often filled in by the enumerator before delivery, as it was necessary to verify each individual data set and situate each card within the overall mass of the census material (von Oertzen Reference Oertzen2019, 112–114). The actual points of interest for the census as such were condensed in no more than eleven questions in the card’s main body, asking for name, date and place of birth, sex, civil and employment status, relationship to the head of household, and literacy, as well as mental and physical disabilities affecting the capacity to learn and earn a living. These questions established each individual’s data record.

Some of the criteria were considered statistical staples, whereas others varied from count to count and were included after much dispute to address particularly pressing political or social concerns (see also Ledebur Reference Ledebur2023, this volume). However, the questions were deliberately few, and compressed for utmost clarity—or so statisticians believed—so that even the simplest mind could understand and answer them concisely. There were no boxes to tick. Except for the last question, which asked for one of four options to be circled, answers had to be written down in words on dotted lines, forcing respondents to inscribe the cards in their own hand. This way, each household’s cards carried a very personal trace, binding the “data doubles” to their creators like a signature (Bouk Reference Bouk2017).Footnote ⁵

Self-inscription via handwriting caused a plethora of problems in later stages of the compiling effort, as many respondents were not used to filling in forms. Few of the original cards have survived, but if critics of the Prussian method are to be believed, cards were returned with millions of ambiguous entries in different colloquial terms, and in handwriting that was often quite clumsy, frequently spilling over into the space allotted to other answers and thus cluttering the cards’ surface (Mayr Reference Mayr1914, 122). And as these very cards were subsequently used to classify, sort, and re-sort all criteria inscribed on them in numerous rounds of counting, the deciphering of the self-entries remained a constant challenge throughout the entire compilation process. Self-inscription by way of counting cards turned the manual aggregation and tabulation of the data into a head-spinning undertaking involving a trusted workforce of hundreds of experienced housewives toiling in their homes (von Oertzen Reference Oertzen2019). Nevertheless, notwithstanding the high price they had to pay, Prussian census officials defended their approach, emphasizing that the act of writing enhanced the circumspection and sincerity of respondents, while also leading to fewer errors than ticking boxes or circling words.Footnote ⁶ Hence the layout of the counting cards’ interface changed little over the next decades, and occasional alterations to “please cross out what does not apply” (“Nicht-zutreffendes ist auszustreichen”) were sometimes reversed for the next count.Footnote ⁷ And once established, the Prussian system of manual data processing remained in place for more than forty years.

Ideals of objectivity

The main goals that Prussian statisticians sought to achieve with self-inscription via counting cards were to gather trustworthy and complete sets of Ur-data to start with, and to keep this Ur-data free from errors throughout the compilation process. Inherent in the Prussian statisticians’ concept of self-inscription was the promise that the “givens,” once carefully selected and gathered in a single action, would make it possible to unlock patterns in the social fabric otherwise unfathomable to the human eye. Their belief that the best way to achieve this insight would be self-inscription rested on their confidence in the counting card’s potential as a medium of veracity. Prussian statisticians saw the card as a paper tool that afforded a spontaneous and yet assiduous self-interrogation in the intimate space of people’s own homes. From the start, self-inscription had been related to ideas of sovereign popular participation, which should be introduced “firstly because of the spontaneity that should be left to the citizens,” to quote from the French summary of a debate at the First International Statistical Congress in Brussels in 1853.Footnote ⁸ During this meeting, proponents of the method had insisted that voluntary participation alone would be conscientious and yield the desired results, and therefore statisticians must fully embrace this approach (Neumann, Reference Neumann1864, 13).

In their pursuit of the untainted immediacy that they expected to be enabled by the new form and the environment set up around it, Prussian statisticians also echoed longstanding claims that their field of expertise was a science in its own right (von Oertzen Reference Oertzen2018; Sepkoski Reference Sepkoski2018). By insisting that these data were best gathered through self-inscription, statisticians implied ideals of mechanical objectivity as a virtue of scientific practice—an ideal that had pervaded all the empirical sciences by the middle of the nineteenth century (Daston and Galison Reference Daston and Galison2007, 196.) Especially in the experimental laboratories, self-registering instruments such as photography and self-eliminating technologies such as instruments that traced the curves of muscle action, which replaced the practices of drawing by hand or using trained judgment, became imperative to scientific objectivity, while human interference was increasingly denounced as “subjective” and prone to error (Daston and Galison Reference Daston and Galison2007, 197).

Photography in particular was hailed, especially in the observational sciences, as yielding representations of natural phenomena untainted by human interference. Just one among many such voices, embryologist Wilhelm His praised photography as a method that “reproduces the object with all its particularities, including those that are accidental, in a certain sense as raw material, but which guarantees absolute fidelity” to the object in question (His Reference His1880, 6). Leading statisticians such as cameralist Wilhelm Butte and August von Schlözer, professor for history and politics at the University of Göttingen, had been among the first in German lands to refer to photography when they described the methods of quantification and data gathering and the promise these held for accuracy. They bolstered their claims with recourse to notions of data as a category of the “here and now,” which permitted statisticians to produce precise snapshots of the state of things, frozen in time.Footnote ⁹ Speaking of self-inscription, Georg von Mayr, head of the Bavarian Statistical Bureau and author of several path-breaking publications on statistical theory, described the gathering of enumeration data as a “fixation of particulars in the enumeration document,” which in his view “virtually represents a photographic record of all elements of observation” (Mayr Reference Mayr1914, 92).Footnote ¹⁰ He regarded this photographic representation of particulars fixed in the enumeration form as a resource (Rohstoff), which statisticians then turned into knowledge about the masses through compilation and analysis (Mayr Reference Mayr1914, 107).

Ernst Engel, director of the Prussian Statistical Bureau and initiator of the 1871 reform, compared the importance of counting cards to the introduction of experiments in the social sciences. He argued that the cards embodied the characteristics of living individuals and thus made those accessible to the methods used in the study of nature (Engel Reference Engel1870, 38).Footnote ¹¹ In another instance, he described population statistics as an observational science devoted to the social realm and best described as a “terrestrial observatory,” providing a bird’s-eye view of social phenomena otherwise unfathomable to human perception. Engel likened the novel methods of gathering population data to the lens of this terrestrial observatory, “which provides the same level of accuracy as the telescopes used by astronomers, or as instruments deployed in chemical laboratories” (Engel Reference Engel1861b, 53).

With reference to Adolphe Quetelet, astronomer and statistician of the Belgian census, Engel defined statistics as “the physics of society” (“Physik der Gesellschaft”), tasked with first observing phenomena of “the physiological, mental, political, and social life of peoples within the nation-states they live in,” and then with “analyzing the connections between cause and effect of these phenomena” (Engel Reference Engel1861a, 53).Footnote ¹² Mayr, for his part, reasoned that population statistics was a social science devoted to the “physiognomy of the populace” (“Physiognomie der Bevölkerung”) (Mayr, Reference Mayr1877, 32). In keeping with these analogies to the social sciences, physics, physiognomy, photography, and the telescope, one can conclude that Engel regarded each entry inscribed on a counting card as a fixed data point whose meaning could be unraveled in relation to other data points brought into statistical vision at the same moment, just like stars in the firmament observed with an unerring telescope during a cold winter night.Footnote ¹³

In a treatise on statistics and the principles of social life published in 1877 as part of a popular series on the laws of nature, Mayr conceded that mass observation of social phenomena such as birth or mortality rates would never achieve “absolute truth,” but rather yield “a very high degree of probability bordering on certainty” (Mayr Reference Mayr1877, 38). However, he saw this not as a weakness of population statistics, but rather as a strength shared with the exact sciences, which were also never immune to error (Mayr, Reference Mayr1877: 38; see also Ledebur Reference Ledebur2023, this issue). In fact, it became common practice to openly discuss the pros and cons of method, practical problems, and issues of margins of error in census offices’ publications, as evidence that population statistics was part of a broader scientific culture.

It was in this spirit of scientificity that statisticians took pride in a public discourse on how to continuously optimize the methods of census taking, while at the same time calling on the population to support the census effort in their own interest. For if statistical mass observation was to match the standard of accuracy achieved in the natural sciences, Prussian officials expected the Ur-data gathered in people’s homes to be both as correct and as complete as had ever been possible. As a factor integral to their scientific reasoning, these officials envisioned public participation as a crucial precondition for all particulars to be provided in unreserved pureness. For this reason, they strove to engage the populace in what they perceived to be the collective project of the young nation’s self-depiction, not unlike an all-encompassing citizen science project.

For Engel, trustworthy data could only be gathered successfully if the public was committed to the project in such a way that people willingly and assiduously shared the necessary information to their best knowledge (“die willige und gewissenhafte Mitwirkung des Volkes,” Engel Reference Engel1875, 42). Census taking, he thus argued, should be announced as an “act of highest national interest” and not just as a usual matter of local policing. Ideally, a census law would provide such a framework, appealing to honor and honesty. In the same vein, he thought, it had to be made crystal clear that the census was to exclusively serve the common good and should only be used to establish general knowledge about the current state of the populace (“Volkszustand”), rather than being inflated by inquiries serving more comprehensive objectives, as they saw in the American census (see also Anderson Reference Anderson1990). Building on a small number of basic questions comprehensible to every ordinary head of household, the aim was to produce numerical aggregates that made it possible to reveal the most crucial universal trends and patterns in order to better understand the social fabric of the young nation. This and nothing else should be of concern to the census, or as Engel wrote: the numerical data “consist of nothing more than knowing of the state of the nation.”Footnote ¹⁴ Engel considered the state’s self-restraint as a sine-qua-non to keep the questions few and simple and to build the necessary trust, emphasizing time and again that the census—in contrast to past experience—was a truly collective, bottom-up undertaking without strings attached.

Considering how enumeration efforts had been conducted in the past, the director did not expect this trust to build overnight, as most people still associated state counts with tax increases, military drafts, and other “incommodious consequences” (“individuell lästige Consequenzen,” Engel Reference Engel1875, 42). Rather, he envisioned the census effort via self-inscription as part of a long-term exercise in nation-building and educational patriotism, which would call upon the civic virtues and duties of every man heading a household. This highly gendered appeal obviously took into account that all adult male citizens over twenty-five years of age had recently been granted the right to vote irrespective of their social rank.Footnote ¹⁵ Embracing both nationalist and participatory civic appeals in order to achieve scientific accuracy, Engel urged all authorities involved in the census effort to “not miss any opportunity to dispel mistrust and fear of the census among the people” (Engel Reference Engel1875, 42).Footnote ¹⁶ Additionally, local authorities were to emphasize that their role in certifying each individual’s data set went no further than ensuring that the information given on each card was complete and correct. In all provinces, officials involved in the process were to be held accountable for guaranteeing that individual census data were not used in any way other than for census enumeration, claiming that misuse of the data would be forcefully condemned (ibid.). Thus, in order to establish the census as a scientific enterprise, Engel appealed to the collective spirit that he saw in the endeavor, urging that the gathering of the data should be entrusted to self-governing agencies on the local level. Census commissions were to be run on a voluntary basis, as were the labors of the many enumerators, whose new assignment was to not interfere in the act of inscription as such, but to prudently shepherd ten to thirty households through the process of delivering the required Ur-data (ibid., 44).

Operating the terrestrial telescope

For all the effort that went into designing the counting card as a simple, stand-alone paper tool, it did not function self-sufficiently. What actually ended up at people’s doorsteps was an envelope called a “counting letter” (Zählbrief, see figure 4). This letter contained a whole set of other card-sized forms, in addition to counting cards for each member of the household, which were all necessary to make the census work: a household list for everyone present at the time of the count; a list for everyone absent; fine-print instructions on how to answer each of the eleven questions on the counting card; and an example card with answers printed in the blanks in cursive to help the recipients understand what was required.

Figure 4. Printed interface of the counting letter (Zählbrief), Prussian census 1871. GStA PK, HA I, Rep. 77, Tit. 94, no. 132, vol. 1, 115.

The envelope kept all of these loose forms together, while also serving as the enumerator’s deputy in reminding the heads of households of the procedure to be followed after the paperwork had been handed over at the doorstep and the counting letter had crossed the threshold into domestic spaces where compliance could not be directly enforced. A printed greeting from the local census commission in the address field combined a politely phrased request to fill in the enclosed forms punctually, truthfully, and in due form (“pünktlich, wahrheitsgetreu und vorschriftsmäßig”). Indeed, many of the high hopes invested in data obtained by self-inscription culminated in the expectation that those filling it out would be “true to form.” The imprint also offered the enumerator’s help upon his return to retrieve the material, should the recipients prefer to have him complete the entries. The wording “will be picked up” (“Wird wieder abgeholt”), printed in bold in the envelope’s upper right corner, referred to this moment, obscuring the fact that this face-to-face encounter would entail a thorough checking of each entry as a crucial first step of official certification, no matter if help was desired or not.

The sets of forms sent to each household provide evidence that in practice, self-inscription was neither self-evident nor instantaneous. Heads of household were asked to invest a fair amount of time and cognitive labor to make sense of all the paperwork and execute what was expected from them. The material exposes the complexity of the experimental set-up for the Prussians’ terrestrial telescope to determine all data points accurately.

Census officials in Berlin were well aware of these challenges. To accommodate the needs of the new method, responsibilities and resources on the ground had been fundamentally reallocated within the grand scheme of the census reform. Traditionally, counting districts had been in charge of managing their part of the count more or less independently from the Statistical Bureau in Berlin, from printing their own enumeration lists to compiling interim results, which were then added up in Berlin. The 1871 census reform brought an end to this kind of decentralized jumble by strictly centralizing control of every aspect connected to the census effort in Berlin, except for the fieldwork of gathering the data. All paper forms needed for the census effort were produced by the printing press of a major newspaper; envelopes came from one other trusted business, selected by the Statistical Bureau in Berlin after a rigorous bidding process.Footnote ¹⁷ Counting districts received these materials in customized and labeled census boxes dispatched to their localities, with meticulous instructions regarding the order in which to pack them for their return to Berlin, once the Ur-data and lists in all counting letters had been checked and certified, so that the content of each box would mirror the social and geographical context of the data harvest, household by household, house by house, street by street, etc. (von Oertzen Reference Oertzen, Schlünder, Bauer and Rentetzi2020). Upon return of the boxes, the manual processing of the data that had been gathered was then entirely done in Berlin.

Centralizing the production of forms and the compiling effort entirely in Berlin did not mean that local authorities were reduced to redundant players. Rather, the new method created new hierarchies and a division of responsibilities that had great impact on how the gathering of the data unfolded in practice. No longer involved in the costly business of producing forms and the laborious compiling of interim tables, authorities on the ground were now all the more expected “to do everything they can to assure success of the new method.”Footnote ¹⁸

This instruction left the legwork required to make self-inscription work much to the discretion of local officials and the census commissions set up for gathering the data. The Statistical Bureau issued some general guidelines. Local authorities were to spare no effort and take the utmost care while preparing, executing, and completing the enumeration process via self-inscription. This in-depth engagement included “using pertinent measures to inform and familiarize the public with what the new method entails.”Footnote ¹⁹

As a first step towards this goal, local officials were tasked with diligently studying instructions and forms sent to them prior to the census, flagging obscurities back to the Statistical Bureau in Berlin. Once fully acquainted with the procedure, it was their responsibility to explain the new procedure to the residents in their districts. This could be done by printing exemplars of the census forms in the local newspapers or by posting them on announcement boards or advertising pillars, by elucidating the why and how of the method in short invocations, or by giving notice of the upcoming enumeration procedure at parish assemblies and local council meetings.

Another crucial responsibility on their part was to nominate local census commissions and enumerators, preferably “men of public spirit who are really interested in the new procedure” (ibid.). These men should, firstly, be capable of fully grasping the overall purpose of the endeavor, its need for participatory momentum, and how to fill in the forms. Additionally, they were also expected to be affable and willing to pass on their knowledge to any head of household—regardless of their social background—in engaging ways, to answer all questions patiently, and to offer help to fill in the forms if desired.

Though all of the aforementioned measures were meant to build trust in order to promote people’s willingness to act on behalf of their civic capacities, it was also the enumerators’ responsibility to exert control as official certifiers. This duty included identifying and registering every household in their assigned area before the count, as well as certifying every entry on each card upon retrieval (Kaufmann Reference Kaufmann1913, 205). This arrangement was necessary from an epistemological point of view. Only if all households were included, and all entries on each card were checked right on the spot, could the data claim to be complete and correct. The Statistical Bureau insisted that individual Ur-data linked to real people were only of interest to statisticians insofar as they guaranteed the correctness of all particulars that were needed for compiling accurate statistics.Footnote ²⁰ What counted for them were the tables and aggregates that were published after each count in mighty tomes. In these, as Engel emphasized, “the specimen or individual is no longer visible” (Engel Reference Engel1861, 163). The Ur-data were only a means to this end, and (almost) all counting cards were discarded as “dead data” as soon as compilation was completed.Footnote ²¹ However, the division of labor that made officials and enumerators on the ground responsible to ensure that the gathered data were complete and correct created a new dynamic, as people and local authorities valued the chains to their “data doubles” in rather opposite ways.

Data frictions—Data yields

In view of how important standardization and strictness of procedure were in all other areas of the census, it seems remarkable that local authorities were not given clearer orders on how to master their fieldwork tasks. In line with the concept’s bottom-up, participatory approach, instructions from Berlin explicitly left it to the in situ judgement of urban, municipal, and rural districts to apply whatever they deemed most appropriate in order to prepare and motivate people to willingly inscribe their data.Footnote ²² Consequently, local authorities’ commitment to implement self-inscription varied greatly.

Some districts exceeded expectations with their creativity in activating resources for the project. In the city of Cologne, high school teachers enlisted as enumerators brought the forms to class a few days prior to counting day to show their students how to help fill in the forms at home. This strategy was used as an exemplar in later counts and discussed as a general instruction for teachers of students over ten years of age, to improve blank form literacy across all localities.Footnote ²³

More often, though, local officials deviated from how the system was intended to work. Some encouraged enumerators to fill the blanks on the basis of the information they had available in their registers because they did not expect heads of household to be able to self-inscribe. In other, mostly rural districts, heads of household were summoned to barns where they underwent group instruction followed by communal fill-the-form sessions, which spared enumerators the time and effort of rattling off instructions at each door. In working class areas, as well as those with large Danish, Polish, or French minorities, census revisors were supported by local police and bailiffs, who sifted through local registers, tax files, electoral lists, and any other records to get the entries right.Footnote ²⁴ Still others succumbed to the temptation of sharing the data hoard with third parties.

When Engel learned that the state of Thüringen had created lists on the basis of the 1875 counting cards, with information on all the physically and mentally ill, and forwarded these to local physician associations to enable further examination, he compassionately condemned this measure as a misuse of census data. In his view, professional organizations should run their own surveys instead of tapping into the state’s data trove, which was not created to serve their special interests. The incident led him to assert that the question be dropped as a mandatory request for the German national census of 1880, claiming that the overall number of handicapped people was too low to justify its inclusion.Footnote ²⁵ This did not mean, however, that he himself abstained from keeping the question on the Prussian Statistical Bureau’s 1880 counting card (Ledebur Reference Ledebur2023, this issue). This move suggests that Engel had nothing against collecting information on physical and mental disabilities, as long as he had control over how the state used that data.

While enumerators rarely encountered outright resistance at the doorstep, most had to deal with a pronounced displeasure at providing information in response to any of the questions asked (Schneider Reference Schneider2013, 237). It was not just workers and rural folk, but also most artisans in towns and cities who failed to display much sympathy or inclination to engage in self-inscription, complaining that the material was too comprehensive and hard to fathom. Such attitudes left the entire labor of inscribing to the enumerators. Their work, in turn, meant that authorities who were in charge of authenticating were kept quite busy. In some localities, correcting false entries ended up being tantamount to complete recounts.Footnote ²⁶ Enumerators, overwhelmed by the burden of soaring responsibilities, withdrew from service once they became aware of what was involved, feeling not competent enough to instruct members of the household and to do the control work. Shrewder volunteers, especially in Berlin, struck deals with the custodians of large tenements to provide information and to distribute and collect the envelopes, leading respondents to complain that their data was fodder for gossip.Footnote ²⁷

Overall, many enumerators who had volunteered in earlier counts complained that their job had become much more burdensome and time-consuming.Footnote ²⁸ The new emphasis on hunting for correct and complete data took a toll on them. In an early example of a real-time reportage, journalist Hugo von Kupffer gave an account of these challenges. Von Kupffer volunteered as an enumerator for the 1880 census. Despite the cheerful tone of his newspaper article, his report highlights vividly what historians mean when they say that nineteenth-century enumeration took individuals (and no longer households) as its main target, teaching them to see themselves through the lens of new categories (Bouk Reference Bouk2017, 94). Kupffer’s vivid portrayal reveals how difficult it was to turn real-life circumstances into the unambiguousness requested by the form, leading him to conclude that

The general unwillingness to spend time with the forms had much to do with the layout of the cards and the fact that, even for the willing, some questions were not precise enough. The dotted lines allotted for answering them also left too much room for guessing. The most difficult question to get right for respondents and official certifiers alike was certainly number seven on the 1871 counting card, which required information on main occupation and sideline jobs. Replies to this question were unusable to the point that the occupational statistics for the 1871 census could only be compiled in the most rudimentary fashion (Engel Reference Engel1875, 233–235).

In their struggle to address these complaints, local authorities demanded that questions be phrased in a more colloquial way that explicitly addressed respondents, such as “What’s your name?” or “Are you male or female?” instead of bluntly stating “Name,” “Sex,” “Civil Status,” etc.Footnote ³⁰ Yet in response to such claims, census officials sided with a small-town head official saying that “it is impossible to invent a form that is brief, useful, and comprehensible to everyone, including the man on the street.”Footnote ³¹ This resonates with Peter Becker’s observation that nineteenth-century reformers saw the need to use administrative “acts of speech” to elevate the public rather than serve it (Becker Reference Becker2011).

However, despite all such complaints, Prussian census statisticians stuck to the system and came to the conclusion that, overall, self-inscription worked quite well. In view of the feedback received from local authorities after the census of 1875, Engel concluded in his review summary that grave complaints about the method and calls to abolish it because it put too much of a burden on everyone involved were voiced only “very sporadically.” He added that, on the whole, most authorities across Prussia had come to “recognize counting cards and self-inscription as the better and more reliable method, adding that the judicious public has befriended and embraced the method.”Footnote ³²

Census-taking via self-inscription was a long-term project, and results were expected to improve each time around, as more people got used to and embraced the census as a collective undertaking in the service of patriotism and accuracy. Therefore, the Statistical Bureau also explicitly rejected suggestions by some local officials to generally exempt all heads of households from self-inscription who were assumed or known to be unable to comply.Footnote ³³

While census officials recognized the extra efforts that districts in areas with low levels of education had to make to return satisfying results back to Berlin, they were confident that each census would yield a higher percentage of cards that were actually self-inscribed. On the whole, they also relied on the fact that the overall amount of gathered data would even out moderate inconsistencies within the entries. Compared to the systemic inconsistencies they had exposed in the counts prior to the reform (Schneider Reference Schneider2013, 214–222), Prussian census officials were certain to have set new standards of accuracy, superior to any other method of gathering population data.

Precision’s pitfalls

The heyday of the Prussian system of self-inscription via counting cards lasted for more than four decades. The tables and graphs produced in this way were widely admired by statisticians at home and abroad, but no statistical office outside German lands adopted the method. Instead, critics of the Prussian way of gathering and processing census information grew louder as the nineteenth century drew to a close, dismissing the census card as a blind alley blocking the way towards mechanization. Self-inscription as such was uncontroversial, but using counting cards with the hand-written Ur-data all the way through the process of tabulation was considered a constraining idiosyncrasy and proof of bureaucratic inertia towards technological innovation (Heide Reference Heide2008). Prussia’s statisticians, however, insisted that their reluctance to abandon their system was based on the epistemic grounds that counting cards with self-inscribed Ur-data ensured the most precise statistical description of the populace, unrivaled by mechanical tabulation, which required the transfer of all data onto punchcards (von Oertzen Reference Oertzen2017).

The Prussian statisticians’ sense of achievement notwithstanding, their system of self-inscription as an at-home scenario that would yield truthful information akin to a photographic record in scientific experimentation proved a goal impossible to come close to. Counting cards, after all, were not blank slates but bureaucratic forms that embodied technologies of power (Plener, Weber, and Wolf Reference Plener, Weber and Wolff2021, IV). And as such, the cards did much more than ask respondents for formalized personal information in order to produce commensurable data. The cards intruded into the intimate space of the home while also reshaping the hierarchies between the Statistical Bureau in Berlin as the center of calculation and the localities in which the data were gathered. Making the latter solely responsible and yet also giving them creative leeway to ensure that everyone accountable filled in their cards correctly fundamentally changed the dynamics of census taking. Counting cards unleashed a new scrutiny in the hunt for personal data on the ground. And because local authorities had to verify every entry and thus connect the data to each individual, their actions often stood in contrast to the noble aims of the census as an operation geared towards aggregates in which the particulars of individuals did not matter as such. The appetite for personal information and the ability to track it proved to be the dark side of the tectonics of power built into the census, as it grew fatally stronger than the state’s stamina to maintain self-constraint (Aly and Roth, Reference Aly and Roth2000). The project of aligning bureaucratic practices to scientific ideals of mechanical objectivity found its limits in the very power structures in which it was embedded. And therefore, being true to form remained an ideal rather than a reality achieved by counting cards and self-inscription. As a practice, however, being true to form (or not) evolved into a cultural technique that in the digital age, most of us have learned to master all too well.