tuberculin

I was fascinated and horrified by the hospital scenes in the book, when Conan Doyle is visiting people treated with tuberculin.

If an animal is tuberculous, the action of the tuberculin causes a fever, which is indicated by a rise in temperature.

Direct experiments and observations collected by thousands show that the tuberculin injections have no unfavorable effect.

Subsequent experiments showed that tuberculin exercised quite a different action to that of healing.