United States Army Hospital, Philadelphia. [graphic] : This is one of the largest army hospitals in the world it is capable of accommodating 3000 men, it has two dining rooms, each 775 feet long, the whole establishment covers twelve acres of ground, and is enclosed by a fence, 14 feet high, the surgeon in charge is Doctor Isaac J. Hays, the distinguished Arctic explorer, who was a former companion of the lamented Doctor Kane. / T. Sinclair's lith. Phila.