14 Director's Report of the 



In the pasteurizing room are the steam pasteurizer, milk cooler 

 and Babcock tester. The upper coils over which the milk flows 

 in the cooler circulate cold water and the lower ones ammonia, 

 so that economical and rapid cooling is secured. The cheese 

 room communicates by an elevator with the basement and with 

 the second story near the cheese-curing rooms, and contains one 

 large and two small cheese vats, one large constant pressure press 

 and one small one. 



Upon the second floor are found a central hall and staircase as 

 below and the arrangement of rooms in the east half does not 

 differ from that of the first story. These rooms are, in succession 

 as before, the botanist's office, botanist's laboratory, entomolo- 

 gist's office, entomologist's laboratory and botanist's museum. 

 The hall between the museum and vault, however, extends 

 entirely across the building to the west wall and forms part of the 

 insulation of the block of cheese-curing rooms. These cheese 

 rooms occupy the west wing and are separated from its outer wall 

 on all sides by a 4-foot passage-way. They are further insulated 

 by double walls and air spaces on the outside and between the 

 separate rooms. These rooms are six in number, each 9 by 10 

 feet, and each provided over the entire, wall space with shelves 14 

 inches wide and 12 inches apart. It is expected to control the 

 temperature in each of these rooms within 2 degrees, running 

 each room independently and at any degree between 30 and 90. 

 A hot-air flue from below and cold-air flue, from the chamber in 

 the attic containing the expansion coils and brine tanks, lead into 

 each room. These flues are closed by dampers operated by com- 

 pressed air and controlled by thermostats. When the tempera- 

 ture falls one degree from 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 delicate is the operation of this system 

 that breathing upon the thermostat will open the cold-air flue; 

 fanning it, the hot-air damper. 



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



