﻿54 



BULLETIN 1374, U. S. DEPARTMENT OP AGRICULTURE 



Table 44. — Results of treatment of cottonseed in live-steam disinfecting 

 machine — Continued 



SERIES 6 



]Speed of machine, 40 revolutions per minute. Time in machine, 1 minute 8 seconds. Steam admitted 



into top conveyor only] 



Test 

 No. 



Number 

 of larvae 

 in tests 



Seed tempera- 

 ture on 

 discharge 



Larv£e 

 kiUed 



Test 

 No. 



Number 

 of larvse 

 in tests 



Seed tempera- 

 ture on ■ 

 discharge 



Larvae 

 killed 







°F. 



Per cent 







°F. 



Per cent 



165 



26 



137 -135 



100 



169 



18 



154 -146 



.100 



163 



16 



136 -137 



100 



151 



9 



147 -147 



100 1 



162 



30 



142 -136 



100 



150 



26 



1513^-147 



100 1 



164 



8 



137 -137 



100 



157 



26 



148 



100 1 



143 



20 



139 



100 



166 



24 



148 



100 



175 



28 



139^^-140 



100 



145 



14 



148 -148 



100 



174 



21 



140 -1391^ 



100 



155 



27 



149 -148 



100 



173 



22 



140 -140 



100 



154 



39 



149 



100 



172 



13 



142 -140 



100 



144 



21 



1491^ 



100 



161 



53 



142 -142 



100 



146 



17 



150 



100 



159 



29 



142 -143 



100 



153 



20 



151H 



100 



160 



19 



143 -142 



100 



149 



10 



153 -1511^ 



100 



158 



26 



146 -142 



100 



167 



18 



153 



100 



171 



20 



147 -142 



100 



168 



28 



153 -154 



100 



170 



33 



143 



100 



148 



24 



157H-153 



100 



152 



32 



147 -144 



100 



147 



24 



158 -157H 



100 



156 



29 



148 -146 



100 











SERIES 7 



[Speed of machine, 50 revolutions per minute. Time of exposure, 55 seconds. Steam admitted into top 



conveyor only] 







"F. 



Per cent 







°F. 



Per cent 



186 



17 



138 -132 



82.3 



191 



16 



147 -140 



100 



178 



25 



1333^-135 



96 



187 



7 



um 



100 



179 



17 



135 -153 



100 



195 



11 



1421^-146 



100 



177 



33 



136 



96.9 



194 



8 



147 -142H 



100 



176 



13 



136 



100 



182 



13 



143 -145 



100 



185 



31 



138 -138 



100 



181 



22 



1511^-143 



100 



192 



17 



140 -138 



94 



190 



10 



144 -147 



100 



184 



29 



140 -138 



100 



189 



15 



147 -144 



100 



193 



13 



138 -147 



100 



188 



13 



1473-^ 



100 



183 



20 



145 -140 



100 



180 



19 



153 -151H 



100 



196 



11 



146 -140 



100 

















SER 



lES 8 









[Speed of machine, 60 revolutions per minute. Time of exposure, 47 seconds. Steam admitted into top 



conveyor only] 







°F. 



Per cent 







°F. 



Per cent 



206 



8 



138 



100 



200 



10 



143-143 



100 



207 



10 



139 



100 



201 



16 



143-145 



93.7 



208 



16 



139-140 



93.7 



199 



10 



145-143 



100 



209 



16 



140-142 



100 ! 



205 



22 



150-143 



100 



213 



30 



141-141 



100 1 



218 



22 



150-143 



100 



214 



22 



141-141 



100 



197 



10 



144 



100 



215 



25 



141-141 



100 



198 



9 



145 



100 



219 



15 



143-141 



100 1 



202 



9 



145-147 



100 



212 



12 



144-141 

 14]>150 



100 



203 



12 



147-147 



100 



216 



18 



100 1 



204 



13 



147-147 



100 



210 



20 



142-142 



100 



217 



10 



150-150 



100 



211 



17 



142-144 



100 











The record of time of exposure in all the series referred to the time 

 required for the seed to pass entirely through the machines, regard- 

 less of which conveyors it was exposed to steam in. It was the pur- 

 pose to show in these tests a range of temperatures from which the 

 safe minimum temperature giving 100 per cent mortality at a given 

 time of exposure might be determined. Owing to irregular boiler 



