DETERMINING GREASE AND DIRT IN WOOL. 
19 
EXPLANATION OF WOOL-SCOURING DATA SHEET. 
Actual weights taken in the laboratory are recorded as shown 
in Table 7 in columns a, b, d, e, and h. All weights of wool shown od 
data sheet are conditioned weights. The others are filled in from 
calculations made from a, b, d, e, and h. The following formula- 
show the calculation used to obtain the figures of each column. 
a — b—c 
c-f=9 
h-b = j 
100 g+c=k 
100 i+c=l 
100 j+c=m 
100 ?+j=n 
100 i-i-j=o 
or: 
Fig. 6.— Baskets of wool. 
A, raw wool before scouring. B, decreased v 
scoured wool, free from grease and dirt. 
maining. 
The weight of basket (b) subtracted from the conditioned weight 
of sample and basket (a) gives the conditioned weight of greasy wool 
(c). 
The weight of basket (b) and weight of filter paper (e) subtracted 
from the conditioned weight of wool, filter paper, and basket after 
extraction (d) gives the conditioned weight of wool and dirt after 
extraction (/). 
The conditioned weight of greasy wool (c) minus the conditioned 
weight of wool and dirt after extraction (f) gives the weight of grease 
