THE BACTERIOLOGICAL LABORATORY 13 



which the preparation of the virus is carried on. 

 This laboratory is always maintained at a tempera- 

 ture of 23 C. In the left wing, on the ground 

 Hoor, is a lecture-theatre for biological chemistry, a 

 laboratory, and a room set apart for photographing 

 microbes, etc. At the end of the block (i.e. at the 

 back) are two rooms (one on each side of a central 

 corridor) used as aquaria. The remaining portion 

 of this block is occupied as a store-room and 

 a general laboratory; the latter being used for 

 the preparation of the various cultivating media, 

 glass-blowing, etc. The second story is, likewise, 

 divided into two halves ; on the left is the micro- 

 biological department, and on the right that of 

 practical biology. On the same floor there is a 

 large laboratory fitted with sterilisers, incubators, 

 evaporating chambers, etc. : in fact, this room is 

 used for the growth of all kinds of microbes. 

 Joining this room is a smaller laboratory, out of 

 which one steps into the museum. In addition, 

 there is a chemico- biological laboratory and a 

 lavatory. The third story of the rear block com- 

 prises two series of rooms, which are all used for 

 research ; the left wing is occupied by the depart- 

 ment of applied or practical bacteriology, while the 

 right wing is devoted to the study of comparative 

 micro-biology or bacteriology. Each of these de- 

 partments is fitted with incubators, sterilisers, and 

 other bacteriological apparatus. 



In each of the departments of the institute there 

 is a director's private room and laboratory. 



Besides the two main blocks there are separate 



