8 BULLETIX 1100, U. S. DEPAKTMEXT OF AGRICULTUEE. 



Table 1. — Compo.rison of effects of dry ueather and v:et weather on conditioning of v:ool. 



Sample. 



A. 



Dry-day 



air 

 weight. 



After 



3 hours 



at .50° C. 



B. 



Wet-day : After 

 air 3 hours 



weight. at 50° C. 



Difference between 



conditioned weights 



AandB. 



Per cent based on 



conditioned "A'' 



samples. 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



Grams. 

 272.5 

 272.8 

 271.1 

 273.3 

 2740 

 303.0 

 272.0 

 269.7 

 277.5 



Grams. 

 263.5 

 262.0 

 259.7 

 262.8 

 262.3 

 291.1 

 262.5 

 259. 1 

 266.0 



Grams. 

 2S4.9 

 283.4 

 282.0 

 283.9 

 282.6 

 311.8 

 282.7 

 278. 5 

 286.8 



ims. 



Grams. . 



266.2 



2.7 



263.2 



1.2 



261.6 



1.9 



264.9 



2.1 



261.3 



-1.0 



29L3 



0.2 



263.5 



1.0 



i59.2 



0.1 



266.6 



0.6 



Per cent. 

 1.01 

 .45 

 .72 

 .79 

 - .38 

 .06 

 .38 

 .038 

 .22 



There is a maximmn 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 wool for different lengths 

 of time and gives comparisons of the effect of conditioning wool 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 uool samples, 

 a. WEIGHTS OF WOOL SAMPLES. 





Sample 

 No. 



Air-dry. 



Dried at .50° C. 



Dried at 100° C. 



Grade of sample. 



End 

 first 

 hour. 



End 

 second 

 hour. 



End 

 thu-d 

 hour. 



End 



third 



hour. 



End 

 fourth 

 hour. 



End 

 fifth 

 hour. 



Idaho fine medium. . . 



Delame 



Do 



Idaho fine medium, 

 vervdirtv 



m,....: 



10 

 11 

 12 



15 



17 



Grams. 

 207.9 

 152.1 

 203.1 



21L7 

 212.0 



Grams. 

 196.3 

 143. 5 

 193.7 



199.6 

 199.6 



Grams. 

 190.7 

 140.5 

 187.5 



195. 1 

 195.0 



Grams. Grams. Grams. 

 188.0 174.96 170.78 

 139.2 133.63 132.17 

 187.7 1 180.16 177. .54 



192.5 '' 177.52 176.57 



192. 6 180. 52 179. 12 



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 



2n.7 

 212.0 



12.1 

 12.4 



16.6 

 17.0 



19.2 

 19.4 



.34. 18 

 31.48 



35.13 

 32.88 



Idaho fine medium. . 



Delaine 



Do 



Idaho fine medium, 

 very dirty 



Do....: 



39.8 

 20. 95 

 27.49 



37.23 

 .34. 51 



