Clerk.—No, Sir.
Physician.—Did you count his respirations?
Clerk.—No, Sir.
Physician.—Then, Sir, what the d——l did you do?
Clerk.—I ran for the stomach-pump.
Dr. John was never tired of inculcating this distinction; it is the backbone of almost all those papers of his that have been just mentioned, and it reappears in others. In his special little essay called Art and Science he formulates it thus:—
IN MEDICINE
Science
Looks to essence and cause.
Is diagnostic.