The Bacteriologic Department of the Corlear Medical School stood at this time on one of the cross-streets of the old East Side, not far from Corlear Park. It was a large, old-fashioned brick building, worn of threshold, and as ugly in line as a livery barn. Its entrance was merely a gap in the wall, its windows rectangular openings to let in the light. Not one touch of color or grace, not one dignified line could be detected throughout its whole exterior. It was constructed for use, not ornament.
Interiorly it was quite as utilitarian. Its halls, bare and cheerless, echoed to the tread and were repellent as those of a barracks. The visitor felt chilled, disappointed, as if he had been met by the insolent servant of an indifferent hostess. It seemed the home of the mathematical, the mechanical, the material; but this was a mistake. It was a house of dreams. The right knock at one of those ugly doors would permit one to step into the presence of the most cheery, the most learned, the most imaginative of individuals--the man of germs, poet, dreamer, and experimentalist, absorbed in the pursuit of the unattainable, concerned with the ultimate structure of organic life, baffled, yet toiling on for love of his work, while the sick of the world believe in him as an angel of altruism.
The far-away rivers of the world have all been traversed and mapped, but the streams of blood in the arteries of man are filled with the unknown. The habits of the Esquimaux, the customs of the dwarfs of Central Africa, the ways of the baboons of Sumatra are minutely set to book, but the wars of the phagocytes remain indeterminate, unexplained. With microscope to his eye the bacteriologist is now examining the constituent parts of the blood, isolating, breeding, and minutely studying the germs of fevers, the growths of tumors, and other elemental forms of human parasites, in order to discover their antagonisms, their likings; for in these jungles of the flesh the war of races proceeds quite as in the Amazonian forests--the white cells against the red, devouring, destroying.