176 CONDENSED BurreRMILK 
case of continuous evaporation the milk is kept at a constant 
level, the lower part of the revolving cylinders dipping into it 
and picking up a film which is automatically scraped off with 
every revolution of the cylinders. 
At the same time air is blown through the hot milk, further 
assisting in the evaporation and also removing gases and other 
volatile substances from the milk. 
During operation the revolving cylinders are charged with 
40 pounds of steam and the temperature of the milk is held at 
about 145 degrees F. 
Thé process of condensing can be carried to almost any de- 
gree of concentration and the desired degree of density is deter- 
mined in a similar manner asin the case of evaporated milk 
and plain condensed bulk milk. 
Capacity.—This machine is constructed in several sizes, 
with capacities ranging from 900 pounds to 8000 pounds of 
raw milk per hour, based on a ratio of concentration of two 
to one, as shown in the following specifications: 
; - |Pounds Capacity A Garona een E: Required 
Model No. | Nuuber Of | Approximate |  Gllons Condensing | pydusred For | Boller 
1920 Cylinders Hilgers Space Capacity Raw Milk Evaporator Cyl- | Capacity 
2 to 1 per Hour inders H. P. 
2 2 355! 175 900 4 15 
4 2 3’x10' 300 1800 7 30 
6 Z 4’x14’ 5 2700 10 40 
of 4 5’x14’ 600 5400 20 80 
8 6 7'x14' 1000 8000 30 120 
Quality of Products from Continuous Concentrators and 
Evaporators.—\Vhen properly operated and when using a good 
quality of raw material these continuous concentrators and film 
evaporators yield a product of excellent flavor and good quality, 
especially suitable for the manufacture of ice cream, but also 
applicable for the manufacture of sterilized evaporated milk, 
condensed buttermilk and condensed whey. 
Cuarter NV. 
CONDENSED BUTTERMILK. 
The value of buttermilk as a part of the feed ration for 
chickens, laying hens, pigs and hogs has long been recognized 
