American Butter Factories. 35 
justice, and with the very strict law on the subject, very little 
trouble is now had on account of adulterated milk. 
Fig. 28. — Instruments for Testing Milk. 
c 
A. Cream-gauge. | C. Floating Thermometer. 
B. Per cent. Glass. | D. Hydrometer or Lactometer. 
Annattoine. 
The butter factories prefer to give colour to their butter by 
having the cows well fed, and by getting up the cream as quickly 
as possible after the milk is drawn. Sometimes, in winter, a 
little colouring may be used, and for this purpose as well also 
as for colouring the cheese, nothing has given so much satis- 
faction as annattoine, or the dry extract of annatto recently 
introduced. 
D 2 
