36 



BULLETIN 872, U 



DEPARTAfEXT OF AGRICULTURE. 



RESULTS OF 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 shotcing rise in temperature on first floor. 



Time of dav. 



First floor: Capacity, 34,790 cubic feet: radiation 262 

 ' square feet. 



Thermometers — 





No.l. 



No. -2. 



No. 3. 



No. 4. 



No. 5. 



No. 6. 



Tulv 28. 1912: 



F. 



F. 



" F. 



F. 



F. 



= F. 



8 a. m 



98 

 104 



96 

 101 



105 

 106 



90 

 94 







10 a. m 



96 



110 



12 m 



110 



106 



111 



108 

 109 



97 

 102 



104 

 105 



113 



2p. m 



1 114 



117 



4 p.m. 



| 118 



115 



110 



107 



108 



120 



6p. m 



120 



116 



110 



110 



110 



122 



8 p. m ' 



121 



117 



112 



113 



112 



123 



9p. m 



1 121 



118 



113 



114 



112 



126 



9.30 p. m 



J 121 



US 



113 



114 



112 



126 



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. IT 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 shotcing rise in temperature on second floor. 



Time of day. 



Second floor: Capacitv. 38.269 cubic feet: radiation, 190 square 

 feet. 



Thermometer — 





No. 1. 



Xo. 2. 



No. 3. 



Xo. 4. 



Xo. 5. 



Xo. 6. 



July 28, 1912: 



: F. 

 98 



: F. 

 94 

 100 

 104 

 112 

 115 

 118 

 118 

 119 



° F. 



93 

 93 

 95 

 99 

 103 

 106 

 110 

 110 



° F. 



92 

 94 

 99 

 104 

 107 

 10S 

 110 

 112 



' F - 



3 F. 



10 a. m. . 



102 



120 

 128 

 134 

 133 

 142 

 143 

 144 



94 



12 m 



108 



97 



2p.m 



114 



118 



100 

 106 





120 



106 





122 



108 



9.30 p. m 



122 



110 







