Antirachitic (Fat-Soluble A) Vitamine

Animals that can be used for experimental purposes: rats and dogs (puppies). The disease can be induced in these animals by feeding them with a synthetic diet in which the fat consists of lard. The animals can be cured of rickets by adding butter fat, codliver oil, or extracts of green vegetables to the diet.*

Antineuritic (Water-Soluble B) Vitamine

For experimental purposes pigeons, and fowls in general, and rats can be used. The disease may be developed with polished rice. Beriberi may be cured with yeast, etc.

Antiscorbutic (Water-Soluble C) Vitamine

Guinea-pigs and monkeys are used. The disease may be developed with oats and autoclaved milk. The curative agent for scurvy is orange juice, or tomatoes, etc.

* Professor Mendel writes to say that " you are going beyond dependable knowledge in this paragraph." This is Dr. Funk's classification, not mine. The discussion in Chapter XII (Vitamines And Rickets) clearly demonstrates that I have not overlooked alternative hypotheses.