CITY MILK PLANTS: CONSTRUCTION AND ARRANGEMENT. 



2. Gravity and pump, more than one story. — Milk is elevated in 

 cans above the first floor and dumped. It flows by gravity through 



Pig. 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. 



