DETERMINING GKEASE AND DIRT IX Wool 
Table 2. — Results of conditioning wool samples Continued. 
c. PER CENT OF MOISTURE LOST. 
Grade of sample. 
Sample 
No. 
Dried at .",11° 
C. 
Dried at L00 c C. 
End 
flrsl 
hour. 
End 
second 
hour. 
End 
third 
hour. 
En i 
third 
hour. 
J'tr cent. 
38. 16 
83. 11 
91.81 
91.22 
fourth 
hour. 
End 
Huh 
hour. 
Idaho fine medium 
10 
11 
12 
15 
17 
Per cent. 
29. IS 
11.05 
14. 19 
l'(r cent. 
44.59 
49.26 
I'tr cent. 
50.00 
61.58 
56.02 
51.57 
56.21 
Per cent. 
' 
Delaine 
100 
Do 
MX) 
Idaho fine medium, very dim- 
Do ;...;. 
100 
LOO 
KM) 
Table 2-c shows that conditioning for three hours at 50° C. re- 
moved from 50 per cent to 61.5 per cent of the moisture contained in 
the air-dry wool tested. The calculations previously shown for the 
theoretical cases of samples A and B are therefore in line with actual 
tests shown in Table 2. These results, therefore, form the basis for 
the decision that conditioning wool samples at 50° C. for three hours 
is sufficient to permit scouring experiments to be conducted within 
reasonable limits of error. As sufficient accuracy is possible by con- 
ditioning at 50° C. for three hours while moisture-free conditioning 
would require a great deal more time and expense, all samples used 
in the wool laboratory tests at Beltsville, Md. ; are conditioned for 
three hours at 50° C. 
The same samples as were used for the tests reported in Table 1 
were also dried at 80° C. and records kept of the percentages of loss in 
moisture at the end of each hour for a period of three hours. All 
percentages in regard to the less-moist samples are based on the air- 
dry weights of the less-moist samples, and all percentages in regard 
to the more-moist samples are based on the air-dry weights of the 
more-moist samples. The results of this experiment are given in 
Table 3. 
Table 3. — Wool samples with different amounts of moistun . W( ighedat < nd of each hour 
while drying for a period of three hours at 80° ('. 
4 
mple, 
it. 
mple, 
hour. 
-3 
a = ■- o.g c\ ©a ! ©2 
z. z - 5 -x ; - = 
a> = y- 
85 2 y D _ 
q - - p.d 
- i 
"p, a 
p, 3 
= _• 
-^ 
f-s* 
= -■=■ = .£■ 5.2 
5~- 
5 w ° 
&& 
C3 ill "tt 
03--( 
cs c _ 
~ — — ~i — *i 
S5^ 
d 
- : - 
Sample. 
"3 
.2 >, 
93 
2^ 
.5 ~ 
»g2 S« 
.3 ea 
l 
- 
= 
2 
T fl a) 
5 1 
err 
E-r 
c £ 
2"S> 
11 
o5 = 
2 8 £ z Z 
- :( 
1 : § - £ = cr 
2 .3 1 J5 = T t 
- 
3 : - 
SITS 
3" 
r% 
ii 3 2 
■ &2 
S|1 
= — = 
r S 
1 
- '- - 
- - 
£*1 
c =.a 
- 
3 
J 
a 
- S 
- 
3 
J 
a - 
- 
s 
Gms. 
Gms. Gms. 
Gms. 
P.ct. P.ct. 
Gms. 
Gms. 
Ptf. 
p.rf. ' 
P.ct. 
p.rt. 
1 
267.3 
285. 1 257. : 
268.7 
3.59 5.85 251.7 
260.7 
248. 1 
7 o7 
9 71 
2 
267. 7 
282.5; 258.3 
267.1 
3.51 5.45 
5-60 
3.. 
269.6 
284.1 259.3 
269-2 
3.82 5.24 254.7 
- - 
269.2 
282.7 260.0 
268.3 
3.41 5.09 254.6 
261.7 
7 1 
5 
267.8 
283.6 257.5 
266.8 
5. 92 252. J 
8. 19 
6 
267.2 
265.9 
268.9 
269.3 
268. 1 
2S2.6 255.5 
281.0 253.5 
2>2. 3 257.5 
284.0 257.4 
264.3 
262.9 
266.1 
265.8 
4.37 6. 17 - 
4.66 6.44 248.9 
423 5.7:: 
4.41 6.4o 252 
255- 6 
- 
259.1 
-6.62 
6.02 
6.31 
7 
9.04 
10.74 
8 
9 
v 77 . 
254.7 
10.31 
Average... 
283. 13 257. 41 
266. 57 
3. 9S 5. 84 252. 13 
259.4 
5. 95 
7.03 
111962— 22— Bull. 1100- 
