So he ranges over the vast battle-ground in which human research struggles with natural hindrance and human ignorance; and in every field he sheds illumination. He attaches great importance to physiology and medicine; he exalts the latter as regulating “a musical instrument of much and exquisite workmanship easily put out of tune.” But he objects to the lax empiricism of contemporary doctors, and their facile tendency to treat all ailments with the same prescription—usually
