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C. After the generalisation of serotherapy, from 1895 to 1905.

The number of children who have been saved in France alone by serotherapy in fifteen years is therefore 1,350,000.

These examples—antisepsis, tuberculosis, and serotherapy—will suffice perhaps to justify experimental pathology.

The third discovery which I shall take as an example demonstrating the value of experimentation, is the history of Serotherapy.

B. During the period of experimentation with serotherapy, from 1889 to 1894.