124 



EvAroRATHD Milk — Sterilizing 



is (ifleii the case esjiecially in fall and winter, the per cent loss 

 of ,t;allon cans due to "swell heads" may become disastrously 

 lart^e, unless the manufacturer makes a special effort to adjust his 

 process for gallon cans. 



l^he installation and efficient use of automatic temperature 

 controllers and recorders is of material assistance for securing 

 uniform results of sterilization. These accessories ai'e made use 

 of in numerous factories, and have proxen to he of \-aluable help 

 to the manufacturer. Aside frf)m the fact that they actually do 

 facilitate the temperature control, they automaticall}' make for 

 increased efficiency of the operator. The knowledge of the 



Fig. 47. Pilot sterilizer 



Coui'tesy of The Engineering Company' 



operator that his work is permanently recurded and checked up 

 exerts a beneficial effect on his performance. 



The operation of an experimental or pilot sterilizer also has 

 proven a great help in the accurate determination of the amount 

 of heat which the e\'aporated milk of any batch requires, to 

 produce the desired \iscosity, body and color and that it will 

 stand without becoming hopelessly curdy. These machines are 

 of small size, accomodating oidy a few cans. 



A few sample cans of each batch are placed in the pilot 

 sterilizer and run through the process. Thus the proper process 



