CITY MILK PLANTS: CONSTRUCTION AND ARRANGEMENT. - 7 
2. Gravity and pump, more than one story.—Milk is elevated in 
cans above the first floor and dumped. It flows by gravity through 
Fic, 2.—General view of equipment in gravity plant, class 1. 
part of the machinery, but pumps are used also before it reaches the 
filler. 
Classes 1 and 2 are rather uncommon, as most dealers seem to con~ 
sider it uneconomical to elevate the milk in cans above the first floor. 
