The text of this e-book has been preserved in its original form apart from correction of the typographic errors listed below. Illustrations have been repositioned adjacent to relevant tabulated data, and the List of Illustrations adjusted accordingly. On p.72 an image of the Xanthin formula incorrectly shows a double bond between a carbon and nitrogen atom – the correct formula is shown on the next page – and there is a date discrepancy on p. 248 between the text and the illustration caption (November 18/February 27). Page numbers are shown in the right margin and footnotes are located at the end. Footnotes are located at the end.

Typographic corrections:
 enyzmes → enzymes
 oxgyen → oxygen
 enyzme → enzyme
 Futher → Further
 mechancial → mechanical
 rythmical → rhythmical
 economcially → economically
 circulirinden → circulirenden
 SUBJECT → SUBJECTS
 equibrium → equilibrium
 availibility → availability
 (166) grams → (166 grams)
 accusstomed → accustomed
 Glassner → Glässner
 strach → starch