DESK ARRANGEMENTS. 21 



Each one of these contains two small sinks let in at convenient 

 points, and is furnished with water and gas. Those portions of 

 the tables directly facing the windows are not supplied with draw- 

 ers, the latter being provided in those sections which presumably, 

 by reason of their not being directly centered behind windows, would 

 not be used for microscopic work. The windows have been placed 

 approximately 16 inches above the level of the desks, so that the 

 strong breezes which prevail in this country would not play havoc 

 with the materials on the work table, but at the same time the light 

 is ample. In the center of each room devoted to biology is a large 

 double work desk supplied with gas, water, and vacuum, with a 

 large sink and drip board at one end. These desks are 36 inches 

 high and are intended for the general work of the laboratory, provid- 

 ing facilities for heating, filtering, distilling, etc. Each one of 

 these central tables has closets underneath and drawers. To one 

 side, along the wall of each biological room, is a chemical work table 

 furnished with gas, water, and vacuum connected with a sink and 

 having a trough extending the length of the desk; the opposite 

 wall is occupied by a hood 8 feet in length, equipped like the side 

 desk, which will supply facilities for work with such materials as 

 should be excluded from the general laboratory air. Each hood 

 has a' separate flue extending up into the attic and connecting with 

 the main trunks in the exhaust, so that ample draft will be 

 provided. The hoods are supplied with gas, water, vacuum, and 

 sinks. 



An exception to the general arrangements outlined above is found 

 in the room on the ground floor devoted to the preparation of cul- 

 ture media. In this there is provided steam for use in connection 

 with the autoclaves and sterilizers, as well as gas, water, and 

 vacuum. The main autoclaves of the building, for the use of the 

 biological laboratory, are placed in this room in which all of the 

 culture media is prepared. It has the usual window desk and hood, 

 but in place of the central work desk there is provided a heavy, 

 square table intended to serve in preparing the various media. 



The rooms for the botanists are not provided with the side tables 

 and hoods. In their place the glass-front herbarium cases are 

 mounted one above the other. 



On each floor of the biological wing there is a room 10 feet wide 

 and 24 feet long for the purpose of accommodating the refrigerating 

 boxes and the incubators. The former are cooled by coils provided 



