Harvey Wiley discusses the need to test preservatives on humans, rather than animals
Writing about these experiments In March, 1905. Dr. Wiley pointed out how unsatisfactory had been the results previously obtained by artificial artificial digestion induced by digestive ferments secured from the stomachs and pancreatic glands of animals, and by feeding food adulterants to guinea pigs and rabbits. "If the digestive conditions of the human animals were the same as those of the animals used for experimental experimental purposes," said he, "it would not be necessary to carry the experimental research any further. It is well known, however, that every species of animal has its own peculiarities peculiarities respecting the digestive processes. Hence they cannot be particularly applied to man. The final answer in such cases, therefore, must be obtained by experiment upon man himself." Dr. Wiley admitted then, with apparent apparent regret, that "the final determination determination of the effects which are produced in the feeding of lower animals animals are determined by an examination examination of the organs themselves, but this crucial test cannot be applied to man."