The physician who has the ambition to keep pace with the advance of his chosen profession, and learns with delightful anticipations the most approved and modern remedy for the special disease in question— with its therapeutical application in detail—will in a great measure fail of the desired end, if he loses sight of the very important fact, that he has a system—a body of many members—to treat, as well as a disease to combat. A system already in a pathologic condition, and was so, as, in a majority of cases, even prior to the inception of the specific zymotic poison.
When we are interrogated, why all children equally exposed to a certain contagion, do not contract the same? we answer that those who are not affected are in good habit of system; their blood is pure; they are in a healthy condition; by which expressions we mean to say, that