DETERMIXIXG GREASE AXD DIRT IX WOOL. 



19 



EXPLANATION OF WOOL-SCOUKING DATA SHEET. 



Actual weights taken in the laboratory are recorded as shown 

 in Table 7 in columns a, h, d, e, and h. All weights of wool shown on 

 data sheet are conditioned weights. The others are filled in from 

 calculations made from a, h, d, e, and h. The following formulas 

 show the calculation used to obtain the figures of each column. 



a-b=c f-j=i 



cl-(b+e)=f '• 100iH-c=Z 



c—f=g 100 j-i-c=7n 



h-b = j i 100g^;=n 



100 g^c=k 



100 {-=-;"=o 



or: 



Fir,. 



-Baskets of wool. A, raw wool before scouring, B, degreased wool, dirt remaining. C, clean, 

 scoured wool, free from grease and dirt. 



The weight of basket (h) subtracted from the conditioned weight 

 of sample and basket (a) gives the conditioned weight of greasv 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 (f). 



The conditioned weight of greasy wool (c) minus the conditioned 

 weight of wool and dirt after extraction (f) gives the weight of grease 



ig). 



