The following typographical errors have been corrected:
Page 180 “Abfällen, Vieweg, Braunschweig,” - had “Viewig”.
Page 188 “wires d from the dynamo D” - had “dynano”.
Page 191 “phosphate are attached, for example,” - had “attached, For”.
Page 192 “But phosphatides occur” - had “phosphatide soccur”.
Page 193 “the nucleic acid from the thymus” - had “nucleidic”.
Page 199 “acetylcholine esterase.” - had “acetylcholin”.
Page 200 “George de Hevesy, Carl F. Cori,” - comma added after Hevesy.
Footnote 39: “See, e.g., Chemical Week, vol. 77” - had “See. e.g.”
Index Entry: “Gahn, Johann Gottlieb, 182” - had “Gähn”
The spelling of “Bertholet” [Claude Louis Berthollet] is as given on the original title page of the work referenced in this paper.
Inconsistent hyphenation of chemical names has been retained.