BIOLOGICAL AND DAIRY BUILDING. 



405 



separated from its outer wall on all sides by a 4-foot passageway. They 

 are further insulated by double walls and air spaces on the outside and 

 between the separate rooms. These rooms are G in number, each 9 by 

 10 ft., with shelves 14 in. wide and lli in. apart over the entire wall space. 

 It is expected to control the temperature in each of these rooms within 

 2°, running each room independently and at any temperature between 

 30 and 90°. A hot-air flue from below, and a cold-air flue from the 

 chamber in the attic containing the expansion coils aud brine tanks, 

 lead into each room. These flues are closed by dampers operated by 

 compressed air and controlled by thermostats. When the temperature 



;.v a: 



B 



Entomologist's 



Laboratory. 



^ 



\ Botanists 

 Museum. 



o 



Entomologist's 

 ~~ Office. 



n m 



n Botanists Laboratory. 



o 



n— n—n 



313 ^SS- 



a / 



Hall. 



Incubator and Culture d 

 Room. 



W 



H 



W^T^^i' 



\ Bacteriologists 



rr^ Office 



Bacter iologist's Labo ratory. 



D 



Roof. 



Fig. 13 Second floor plan of Biological and Dairy Building, New York State Experiment Station. 



falls 1° below the point fixed upon, the thermostat turns a valve and 

 the compressed air opens the hot-air damper near the floor. Should 

 the temperature rise, the cold-air flue in the ceiling is opened. So deli- 

 cate is the operation of this system that breathing upon the thermostat 

 will open the cold-air flue, and fanning it will open the hot-air damper. 

 In front of the second story and to the right of the center are the 

 bacteriologist's office and laboratory, a culture and incubator room, and 

 a storage and work room. A portion of the incubator and culture room 

 can be shut off from the rest by a glass partition and its temperature 



