know it. Finally, to cut a long story very short, these two factors or
vitamines were both found to be essential to growth and in the feeding
mixtures that had been used were distributed as follows

_Vitamine A_
Fat-soluble
Non-antineuritic
Present in butter fat and egg-yolk fat

_Vitamine B_ (_Funk's vitamine_)
Water-soluble
Antineuritic
Present in protein-free milk, ordinary lactose, yeast and rice polishings

[Illustration: FIG. 2. COMPOSITE CHART OF OSBORNE AND MENDEL PUBLICATIONS

These four charts all show the power of sources of the A vitamine to bring
about recovery after failure on diets lacking that vitamine.

I (from _Journ. Biol. Chem._, 1913-14, xvi, 423). In this group the
diet consisted of the following percents: Protein, 18; starch, 26; protein
free milk, 28; lard, 28. In the part of the periods marked butter, 18 per
cent of butter was substituted for an equal amount of lard.

II (from _Jour. Biol. Chem._, 1913, xv, 311). Shows recovery on
addition of butter fat to a diet containing all the nutrients and
artificial protein free milk. These diets contained the following
percents: Protein, 18; lactose, 23.8; starch, 26; milk salts, 4.2; total
fats, 28.