BULLETIN 1100, U. S. DEPARTMENT OF AGRICULTURE. 
Table 1. — Comparison of effects of dry weather 
and wet w 
eather on conditioning of wool. 
A. 
B. 
Difference between 
conditioned weights 
Sample. 
Dry-day 
air 
weight. 
After 
3 hours 
at 50° C. 
Wet-day 
air 
weight. 
After 
3 hours 
at 50° C. 
AandB. 
Per cent based on 
conditioned "A" 
samples. 
1 
Grams. 
272.5 
272.8 
271.1 
273.3 
274.0 
303.0 
272.0 
269.7 
277.5 
Grams. 
283.5 
262.0 
259.7 
262.8 
262.3 
291.1 
262.5 
259.1 
266.0 
Grams. 
284.9 
283.4 
282.0 
283.9 
282.6 
311.8 
282.7 
278.5 
286.8 
Grams. 
266.2 
263.2 
261.6 
264.9 
261.3 
291.3 
263.5 
259.2 
266.6 
Grams. 
2.7 
1.2 
1.9 
2.1 
-1.0 
0.2 
1.0 
0.1 
0.6 
Per cent. 
1.01 
2 
.45 
3 
.72 
4 
.79 
- .38 
6 
.06 
7..... 
.38 
8 
.038 
9 
.22 
There is a maximum difference of 2.7 grams, or 1.01 per cent, in the 
moisture of samples A and B after three hours' conditioning. Accord- 
ing to calculations of grease indices for samples A and B, which are 
shown just preceding Table 1, this difference is not large enough 
to affect seriously the figures for grease index. 
Table 2 shows the results of conditioning w T ool for different lengths 
of time and gives comparisons of the effect of conditioning w T ool at 50° 
C. as compared with conditioning at 100° C. Comparison of the weights 
of samples after four hours' drying at 100° C. with the weights of the 
same samples after five hours' drying at 100° C. shows that 
the extra hour resulted in a very small loss in weight. It is, 
therefore, assumed that the weight of the samples after five hours' 
drying at 100° C. shows the lowest weight that may be obtained by 
driving off moisture. In other words, weights of the samples after- 
heating five hours at 100° C. are considered moisture-free, and the 
difference between these weights and the original air-dry weights rep- 
resents the moisture contained in the air-dry samples, and this figure 
is used as the basis for calculating the percentage of moisture lost. 
Table 2. — Results of conditioning wool samples. 
a. WEIGHTS OF WOOL SAMPLES. 
Grade of sample. 
Idaho fine medium.. . 
Delaine 
Do 
Idaho fine medium, 
very dirtv 
Do....: 
Idaho fine medium. . . 
Delaine 
Do 
Idaho fine medium, 
very dirty 
Do 
Sample 
No. 
Air-dry. 
Grams. 
207.9 
152.1 
203.1 
211.7 
212.0 
Dried at 50° C 
Dried at 100° C. 
End 
first 
hour. 
Grams. 
196.3 
143.5 
193.7 
199.6 
199.6 
End 
End 
End 
End 
second 
third 
third 
fourth 
hour. 
hour. 
hour. 
hour. 
Grams. 
Grams. 
Grams. 
Grams. 
190.7 
188.0 
174. 96 
170. 78 
140. 5 
139.2 
133. 63 
132. 17 
187.5 
187.7 
180. 16 
177. 54 
195.1 
192.5 
177. 52 
176. 57 
195.0 
192.6 
180. 52 
179. 12 
End 
fifth 
hour. 
Grams. 
168. 10 
131. 15 
175.61 
174.47 
177. 49 
b. WEIGHT OF MOISTURE LOST. 
10 
11 
12 
207.9 
152.1 
203.1 
11.6 
8.6 
9.4 
17.2 
11.6 
15.5 
19.9 
12.9 
15.4 
32. 94 
18.47 
22.94 
37. 12 
19.93 
25. 56 
15 
17 
211.7 
212.0 
12.1 
12.4 
16.6 
17.0 
19.2 
19.4 
34.18 
31.48 
35.13 
32.88 
39.8 
20.95 
27.49 
37.23 
34.51 
