[The frequencies of derived forms (such as possessives in -'s, negatives in un-, adverbs in -ly, and verb forms in -ed, -ing, and -s) are computed from certain word counts as yet unpublished, in which a record was kept of all distinguishable forms of every word. The ratio of each such derived form to the basic form of the word is computed; and the distribution tables showing the variation in each such ratio are presented and discussed.]