The gastric laboratory uses its protein ferment under an acid reaction.

Finally, as the digestive canal is a complex system, a series of separate chemical laboratories, I cut the connections between them in order to investigate the course of phenomena in each particular laboratory; thus I resolved the digestive canal into several separate parts.

From the described experiment it is clear that the mere act of eating, the food even not reaching the stomach, determines the stimulation of the gastric glands.

Physiology has, at last, gained control over the nerves which stimulate the gastric glands and the pancreas.

Don't become a mere recorder of facts, but try to penetrate the mystery of their origin.

Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise.