36 



BULLETIN 8*72, U. S. DEPARTMENT OF AGRICULTURE. 



RESULTS OK HEATING MILL NO. 3, 



One hundred per cent of insects were killed on the first to deck floors. In 

 the basement 90 per cent were killed ; the steam-pipe exhaust opened into a 

 pit beneath the basement floor and this allowed the escaping steam to enter 

 the basement and keep the air moist. 



Mill No. 4. 



Frame building; day (July 28, 1912) partly cloudy with light breeze; out- 

 door maximum temperature 95° F. ; outdoor minimum temperature 72° F. 

 Heating system, steam pipes along wall, steam pressure of about 80 pounds 

 maintained during heating. Capacity, 1,000 barrels. 



first floor. 

 Location and reading of thermometers. — No. 1, hanging in the open, 5 feet 

 high, 15 feet from steam pipes; No. 2, hanging in the open, 5 feet high, 18 

 feet from steam pipes ; No. 3, resting on a roll in a roller, 12 feet from steam 

 pipe ; No. 4, in 2 inches of flour near floor, 5 feet from steam pipes ; No. 5, in 

 flour in a conveyor near floor, 20 feet from steam pipes ; No. 6, hanging in the 

 open 6 feet high. 20 feet from steam pipes. 



Table VII. — Data showing rise in temperature on first floor. 



Time of day. 



July 28. 1912: 

 8a. m... 

 10a. m.. 

 12m.... 

 2 p. m... 

 4 p. m... 

 6 p. m... 

 8 p. m... 

 9p. m... 

 9.30 p. m 



First floor: Capacity, 34,790 cubic feet; radiation 26,2 

 square feet. 



No. 1. 



F. 

 98 

 104 

 110 

 114 

 118 

 120 

 121 

 121 

 121 



Thermometers— 



ho. 2. 



o p 



96 

 101 

 106 

 111 

 115 

 116 

 117 

 118 

 118 



No. 3. 



No. 6. 



SECOND FLOOR. 



Location and reading of thermometers. — No. 1, hanging in the open, 5 feet 

 high, 22 feet from steam pipes ; No. 2, hanging in the open, 5 feet high, 18 feet 

 from steam pipes; No. 3, in 3 inches of bran near floor, 5 feet from steam pipes; 

 No. 4, in flour in an elevator boot resting on floor, 17 feet from steam pipes; 

 No. 5, in an oven in a laboratory, 5 feet high and 3 feet from steam pipes ; No. 

 6, in flour in an elevator boot resting on floor, 30 feet from steam pipes. 



Table VIII. — Data showing rise in temperature on second floor. 



Second floor: Capacity, 38,269 cubic feet; radiation, 190 square 

 feet. 



Time of day. 



1 





Thermometer — 









No. 1. 



No. 2. 



No. 3. 



No. 4. 



No. 5. 



Np. 6. 



July 28, 1912: 



° F. 

 98 



F. 

 94 

 100 

 104 

 112 

 11.5 

 118 

 118 

 119 



F. 

 93 

 93 

 95 

 99 

 103 

 106 

 110 

 110 



° F. 

 92 

 94 

 99 

 104 

 107 

 108 

 110 

 112 



° F - 



'■F. 



10a. m 



102 



120 

 128 

 134 

 133 

 142 

 143 

 144 



94 



12 m 



' 108 



97 





i 114 



100 





1 118 



106 





120 



106 





122 



108 



9.30 p. m... 



122 



110 







