54 
BULLETIN 1374, U. S. DEPARTMENT OF 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 
Larvae 
killed 
Test 
No. 
Number 
of larvae 
in tests 
Seed tempera- 
ture on 
discharge 
1 
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 
162 
30 
142 -136 
100 
150 
26 
151J^-147 
100 . 
164 
8 
137 -137 
100 
157 
26 
148 
100 | 
143 
20 
139 
100 
166 
24 
148 
100 • 1 
175 
28 
139^-140 
100 
145 
14 
148 -148 
100 
174 
21 
140 -139H 
100 
155 
27 
149 -148 
100 
173 
22 
140 -140 
100 
154 
39 
149 
100 j 
172 
13 
142 -140 
100 
144 
21 
149^ 
100 j 
161 
53 
142 -142 
100 
146 
17 
150 
ioo ; 
159 
29 
142 -143 
100 
153 
20 
151H 
ioo j 
160 
19 
143 -142 
100 
149 
10 
153 -151^ 
100 1 
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 
157^-153 
100 1 
152 
32 
147 -144 
100 
147 
24 
158 -157M 
100 
156 
29 
148 -146 
100 
SERIES 7 
[Speed of machine, 50 revolutions per minute. Time of exposure, 55 seconds. 
conveyor only] 
Steam admitted into top 
°F. 
Per cent 
°F. 
Per cent 
186 
17 
138 -132 
82.3 
191 
16 
147 -140 
100 
178 
25 
133^-135 
96 
187 
7 
141^ 
100 
179 
17 
135 -153 
100 
195 
11 
142^-146 
100 
177 
33 
136 
96.9 
194 
8 
147 -142^ 
100 
176 
13 
136 
100 
182 
13 
143 -145 
100 
185 
31 
138 -138 
100 
181 
22 
151^-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 
147H 
100 
183 
20 
145 -140 
100 
180 
19 
153 -151H 
100 
196 
11 
146 -140 
100 
SERIES 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 i 
199 
10 
145-143 
100 
209 
16 
140-142 
100 
205 
22 
150-143 
100 
213 
30 
141-141 
100 
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 
202 
9 
145-147 
100 
212 
12 
144-141 
100 
203 
12 
147-147 
100 
216 
18 
141-150 
100 
204 
13 
147-147 
100 
210 
20 
142-142 
100 
217 
10 
150-150 
100 
211 
17 
142-144 
100 
1 
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 
