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.
Ivan PavlovAs we have seen, bread, and especially dry bread, evokes secretion of considerably larger quantities of saliva than meat.
Ivan PavlovBut man has still another powerful resource: natural science with its strictly objective methods.
Ivan PavlovAs was to be expected, the discovery of the nervous apparatus of the salivary glands immediately impelled physiologists to seek a similar apparatus in other glands lying deeper in the digestive canal.
Ivan Pavlov