Amoebae
were demonstrated in one form of dysentery, and in other tropical
diseases protozoa were discovered, so that we were really prepared for
the announcement in 1905, by Schaudinn, of the discovery of a protozoan
parasite in syphilis. Just fifty years had passed since Pasteur had
sent in his paper on "Lactic Acid Fermentation" to the Lille Scientific
Society--half a century in which more had been done to determine the
true nature of disease than in all the time that had passed since
Hippocrates. Celsus makes the oft-quoted remark that to determine
the cause of a disease often leads to the remedy,(*) and it is the
possibility of removing the cause that gives such importance to the new
researches on disease.
(*) "Et causae quoque estimatio saepe morbum solvit," Celsus,
Lib. I, Prefatio.--Ed.
INTERNAL SECRETIONS
ONE of the greatest contributions of the nineteenth century to
scientific medicine was the discovery of the internal secretions of
organs. The basic work on the subject was done by Claude Bernard, a
pupil of the great Magendie, whose saying it is well to remember--"When
entering a laboratory one should leave theories in the cloakroom." More
than any other man of his generation, Claude Bernard appreciated the
importance of experiment in practical medicine.
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