Blood Feud: Carl Schmidt, Karl von Vierordt and the Evolution of Quantitative Blood Methods

This paper will examine the accomplishments and quarrels of two mid-19th Century German physiologists who worked towards characterizing the components of human blood. Between 1848 and 1852, Carl Schmidt and Karl von Vierordt, two accomplished investigators who taught at universities in Tübingen and Dorpat, published research that quantified the organic and inorganic components in human blood (Schmidt) and counted the number of red blood cells in a unit volume of blood (Vierordt). Their work had very little overlap, except in their mutual interest in improving blood fluid analytical techniques. Schmidt’s work attempted to determine how cholera and other diseases affected the amounts of blood components, while Vierordt’s goal intended to improve blood cell microscopy methods, a goal that he accomplished.