32 



BULLETIN 873, U. S. DEPARTMENT OF AGRICULTURE. 



12. By beginning the heat process directly after shutting clown 

 mill Saturday afternoon and continuing until Sunday night or early 

 Monday, there is no loss in producing hours. 



EXPERIMENTAL DATA OX HEAT FUMIGATION. 



The following temperature- and results were secured in experi- 

 mental work by Dean (mills 1 to 4) and by Goodwin 5 (mill 5). 



Mill No. 1. 



Brick building; day i July 7-8, 1312) calm, partly cloudy: outdoor maximum 



temperature 91 = P., outdoor minimum temperature 73° F. Heating system, 

 steam pipe- along walls, except in space beneath first floor where radiators are 

 as L Steam pressure of about 20 pounds maintained during experiment. ■ Ca- 

 pacity of mills. 800 barrels. 



OX FIEST AXD SECOXD FLOOES. 



Location and reading o i thermometers. — The thermometers were located on 

 these floors as follows : No. 1. in 2 inches of flour in elevator boot on floor. 8 

 feet beneath steam pipes : No. 2. hanging in middle of room. 5 feet high, 15 feet 

 from steam pipes : No. 3. in 2 inches of flour in elevator boot on floor. 12 feet 

 from steam pipes: No. 4. hanging in the open. 4 feet high. 15 feet from steam 

 : as : N< ■" between the rolls in a roll, 11 feet from steam pipes: No. 6. hang- 

 ing in the open. 6 feet high, near roll machinery. 



Table I. — Data showing rise in temperatures on first and second floors. 



. i—e ::' i-3.-r. 



First "oor: Capacity. 28,728 j Second floor: Capacity. 2S.728 

 cubic feet: radiation, 52-5 cubic feet: radiation. 560 

 square feet. square feet. 



Xo. 1. 



Thermometer- 



Xo. 4. 



No. 5. 



Xo. 6. 



JulvT 1912 



: .: ' .-, =2. 

 11.30 a.m. 



L . m . 



:.s:t.. m.. 



:■.•."-. n . . 

 4.30 p. m. . 

 5.30 p.m.. 



7p.m 



■ m . 

 9.30 p". m.. 

 Julys. 1912: 



9a.m 



lla. m 



12m 



2r>. m 



-. p. m 



' :t>. m.. 





= F. 



: F. 



S3 



90 



86 



83 



94 



38 



S4 



9S 



91 



^v 



104 



96 





106 



100 



J3 



107 



102 



"-- 



110 



103 



j" 



110 



107 



j7 



113 



10S 



:i 



115 



10S 



F. 



122 

 124 

 125 

 128 



1-v 

 I.v 



116 

 117 

 IIS 

 IIS 

 120 

 121 



105 



97 



110 



r - 



117 



1" 



120 



102 



123 



104 



125 



105 



127 



10S 



129 



109 



130 



111 



140 



122 



142 



125 



144 



126 



144 



127 



147 



129 



146 



131 



99 

 106 



111 

 US 

 121 

 123 

 125 

 127 

 129 

 129 



140 

 142 

 144 

 144 

 147 

 145 



OX THIED AXD FOUETH FLOORS. 



Location and reading of thermometers. — Thermometers were located on these 

 floors as follows : Xo. 1. hanging in the open. 5 feet high. 15 feet from steam 



6 Op. cit 



