COMPOSITE SAMPLING 61 
Fig.22.— Fig. 2 .— 
Milk thief. 
Fig. 21.—Milk sampling 
sampler. tube. 
where children, and others unfamiliar with their poison- 
ous properties, can not have access to them. 
The bichromate of potash and corrosive sublimate can 
be purchased in tablet form, each tablet containing enough 
preservative to keep a pint of milk sweet for about two 
