and Laboratory Methods. 



1915 



drawers is enclosed in a cabinet fitted with two glass doors in front. By opening 

 these doors the drawers may be removed or returned. One of these drawers is 

 assigned to each student, and in it he is able to place all the cultures which it is 

 necessary for him to have at any one time during his course. These incubators 

 are heated by hot air supplied by a Bunsen burner, or two if necessary, which 

 are placed in a chamber under the drawers. From this chamber a large number 

 of brass pipes pass up along the back and two sides, conveying the heat to 

 another chamber above the drawers, at the same time giving off heat to inter- 

 mediate portions of the cabinet. From the upper chamber ventilation is secured 

 by means of an adjustable ventilator. The temperature is governed by a Roux 



Fig. '). — Students' Lockers, Library, and Media Cabinet. 



bimetallic regulator. It does not vary more than one degree in the different 

 parts of the incubator, notwithstanding the fact that it is in constant use by the 

 students. 



The confusion incident to students passing to and fro in the laboratory is 

 largely overcome. The student on entering the laboratory takes the drawer 

 containing his cultures from the incubator to his desk, and proceeds with their 

 study without further movement. When through with the day's work he returns 

 the drawer to its proper place. He may also come in between periods, which is 

 often necessary, and examine his cultures without interfering with the cultures 

 of any one else. From the floor plan it will be seen that the desks for study are 



