It goes without saying that the desire to accomplish the task with more confidence, to avoid wasting time and labour, and to spare our experimental animals as much as possible, made us strictly observe all the precautions taken by surgeons in respect to their patients.

If we could look through the skull into the brain of a consciously thinking person, and if the place of optimal excitability were luminous, then we should see playing over the cerebral surface, a bright spot with fantastic, waving borders constantly fluctuating in size and form, surrounded by a darkness more or less deep, covering the rest of the hemisphere.

Learn the ABC of science before you try to ascend to its summit.

Learn, compare, collect the facts!

As we have seen, bread, and especially dry bread, evokes secretion of considerably larger quantities of saliva than meat.

But man has still another powerful resource: natural science with its strictly objective methods.

Appetite, craving for food, is a constant and powerful stimulator of the gastric glands.