150 EVAPORATED MiLK—MojJONNIER CONTROLLER 
Where sterilizing is done with steam only, without using 
superheated water, it is recommended to take twenty minutes 
for coming up. ‘The above table is arranged upon this basis. 
The table, however, can be readily adapted to a system requir- 
ing fifteen minutes for coming up, by taking five minutes to 
come up to the point marked 10 upon the table, or to 190 de- 
grees F. 
Tt is also recommended that in-the pilot sterilizer, the sam- 
ples be cooked to 243 degrees F. and that the “jump” from 230 
degrees to 243 degrees be made in two minutes. It is very 
important to know the exact second when the mercury column 
reaches 243 degrees. The milk should be held at this tempera- 
ture for fifteen minutes to the exact second. 
Cooling the Five Sample Cans.—The instant the clock shows 
that the samples have been sterilized as indicated above, both, 
discharge valve and cold water valve should be opened simul- 
taneously. It is best to cool the five samples to about 75 de- 
erees F. This should take not to exceed five minutes, depending 
upon the temperature of the water available. This is something 
each operator must judge for himself. 
Testing the Sample Cans for Viscosity——As soon as the 
sample cans are cooled in the sterilizer, as indicated above, 
the cans are dried on the outside and are then opened and 
each can is placed in the proper position in the viscosimeter 
rack. It will be noticed that the same scheme of marking the 
spaces upon the viscosimeter rack has been observed as in the 
case of marking the cans. It 1s very desirable to cool the sam- 
ples to as nearly 75 degrees as possible. Tf this is not done, 
the viscosity should be corrected for temperature, using the 
scale of corrections that 1s furnished with the viscosimeters. 
Make the viscosity test as follows: 
(a) Different sizes of balls are furnished, corresponding to 
the product that it may be desired to test for viscosity. A special 
viscosity ball is furnished in the case of evaporated milk, and 
this is not interchangeable with any other ball for this purpose. 
Therefore, see that the proper ball is being used. 
(b) Fasten one end of the wire in the knurled nut upon the 
