INSECT CONTROL IN FLOUR MILLS. 



37 



THIRD 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, 20 feet 

 from steam pipes; No. 3, in flour in conveyor, 6 feet high, 8 feet from steam 

 pipes ; No. 4, in flour in a purifier, 4 feet high, 13 feet from steam pipes ; No. 5, 

 in flour in an elevator boot resting on floor, 4 feet from steam pipes ; No. 6, in 

 flour in a conveyor near floor, 11 feet from steam pipes. 



Table IN. — Data showing rise in temperatures on third floor. 



Time of day. 



Third floor: Capacity, 49,375 cubic feet: radiation. 267 square 

 feet. 



Thermometer — 



No. 1. 



No. 2. 



No. 3. 



No. 4. 



° F. 



° F. 



° F. 



95 



94 



96 



101 



100 



98 



106 



104 



104 



112 



108 



108 



117 



112 



112 



121 



116 



116 



123 



119 



118 



124 



120 



122 



No. 5. 



No. 6. 



Ju]y 28, 1912: ° F. 



8 a. m 98 



10 a. m 104 



12 m 109 



2 p. m 115 



4 p. m 120 



6 p. m 124 



8 p. m 126 



9.30 p. m „ 127 



100 

 104 

 108 

 112 

 114 

 116 



° F. 



102 

 99 

 103 

 108 

 112 

 115 

 114 



FOURTH FLOOR AND DECK. 



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

 high, 26 feet from steam pipes; No. 2, hanging in the open. 5 feet high, 28 feet 

 from steam pipes ; No. 3, in flour in an elevator boot, 6 inches from floor, 24 

 feet from steam pipes; No. 4, in flour in a conveyor near floor, 13 feet from 

 steam pipes ; No. 5, in flour in a conveyor near floor, 22 feet from steam pipes ; 

 No. 6, hanging in the open, 5 feet from floor ; No. 7, in flour in a conveyor near 

 floor. 



Table N. — Data showing rise in temperatures on fourth floor and deck. 





Fourth floor and deck: Capacity, 69,580 cubic feet, including deck; 

 radiation, 310 square feet; radiation, deck, none. 



Time of day. 



Thermometer- 



Deck thermom- 

 eter — 





No. 1. 



No. 2. 



No. 3. 



No. 4. 



No. 5. 



No. 6. 



No. 7. 



July 28, 1912: 



° F. 

 101 

 103 

 110 

 116 

 122 

 126 

 126 

 127 



° F. 

 98 

 100 

 107 

 114 

 120 

 123 

 123 

 124 



F. 

 93 

 95 

 102 

 107 

 113 

 116 

 118 

 118 



° F. 

 94 

 96 

 100 

 102 

 106 

 110 

 115 

 114 



F. 

 97 

 92 

 98 

 100 

 105 

 109 

 113 

 113 



F. 

 104 

 106 

 114 

 122 

 126 

 128 

 127 

 127 



° F. 

 100 



10a. m... 



99 



12 m 



112 





113 





118 





123 





125 



9.30 p. m 



126 







RESULTS OF HEATING MILL NO. 4. 



One hundred per cent of the insects were killed on the third, fourth, and deck 

 floors, 95 to 100 per cent were killed on the second, and 90 to 95 per cent were 

 killed on the first floor. 



