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fitted up for special experiments and investigations. On the same floor there are two quarantine rooms, one of which is here shown in Fig. 3, wherein aie seen the cages in which are kept the animals under observation, or those presenting pathological conditions requiring their isolation. Beyond these we have the autopsy room, fitted out with all the modern appliances for performing post mortems.

In the case of three of these rooms, the walls are coated with hard paint, and center-drains are found in their concrete floors for the purpose of frequent flushing. One of the quarantine cages measures 27 $$\times$$ 24 $$\times$$ 20 inches and a larger one 29 $$\times$$ 36 $$\times$$ 30 inches, the top in any case being five feet from the floor. These comfortable quarters are of galvanized iron and fitted with a door which can not be opened by the animal.

Passing to the second floor of this building, we find it given over to a single room of considerable size, measuring thirty feet by sixty-nine. It is lighted overhead by a large, central skylight, while windows are only found in the north and east walls, the south and west ones being unpierced in any way to admit light. In this room is kept the collection of pathological specimens, some of which are from human subjects for the purposes of comparison. Many drawings, charts and photographs are upon the walls, while tables and desks are placed in convenient corners for the use of those doing clerical or laboratory desk work.