128 



CLEAN MILK 



does not wish to make a sterilizer, the largest size only should 

 be bought (Fig. 30), as it is most economical in saving the 

 expense of doing several sterilizations daily, because with it all 

 bottles and every article of dairy utensil can be sterilized at one 

 time. In case the Star galvanized sterilizer is used, the bottle 

 carriers described on page 137 may be employed to hold the bottles 

 in the sterilizer, or a rack and truck similar to that pictured on pages. 

 103 and 104 may be utilized. 



Fig- 3°- 



fill 



Star Sterilizer. 



This sterilizer is made of heavy galvanized iron, riveted and 

 soldered together, and holding from 240 to 632 quart bottles, ac- 

 cording to the size. It is supplied with perforated steam coil and 

 trapped drain outlet, and it is well to have an exhaust to carry off 

 surplus steam, although the doors are not steam-tight when closed. 

 A thermometer placed in the centre of the door is also advisable. 

 Both the heavy pressure and the galvanized iron sterilizers are 

 made either with a door at one end or a door at each end. The 

 latter arrangement is a convenience when there is a separate room. 



