MILK-PLANT EQUIPMENT. 5 
of a set of scales would provide for an equitable method of pur- 
chasing milk, whereby farmers would receive full payment for the 
exact quantity of milk delivered. 
Losses of milk which result from buying by measure instead of 
by weight are due to the following causes: 
1. Cans not filled by farmer. 
2. Milk slopped in transit. 
3. Cans dented and not holding full quantity. 
4. Leaky cans. 
5. Loss from contraction and expansion of milk. (Experiments- have 
shown that milk shrinks at least 0.2 per cent in cooling from 70° 
to 50° F.) 
DRIP SAVER. 
A drip saver (fig. 2) helps to reduce the loss from shrinkage of 
milk. This may be a homemade affair or one can be purchased at a 
moderate price from a dairy-supply company. 
Fig. 2. — Method of draining cans to prevent waste. The illustration shows also jacket- 
ing of cans to keep milk cool. 
