101 



more cows should not have a so-called feed cooker so as to 

 produce steam, even at a low pressure, and thus have the 

 means of properly cleaning his cans and dairy utensils. They 

 are sold cheap enough, varying from $35 to $75, and are as a 

 rule, built in America, like a vertical boiler. 



SIP 



Fig. 105. 



I said a very low pressure would do, yet if perfect steriliza- 

 tion is to be obtained, there should be a pressure of not less 

 than twenty Ibs. and great boiler like ovens have been built 

 for sterilizing bottles, but as far as I can learn there is an 

 objection to the high heat which seems to act on the glass and 

 keeps it "cloudy" so that bottles are not bright. Further- 

 more low pressure steam should be all sufficient. 



Prof. Russell suggested a galvanized iron box (Fig. 105) 

 taken from Wisconsin bulletin. There is a square box made 

 of galvanized iron with a door and a vent for the escape of 

 steam V. The steam enters at St. P through a pipe provided 

 with a dropcock C, and with four openings ST. PV with pipes 

 P inserted, and one SV opening into the upper part of the box. 

 There are two shelves WS of wire netting, and the lower 

 space is .used for cans placed directly over the steam pipes P, 

 while the upper shelf is used for bottles, covers, etc. This 

 and similar boxes are made in any size or styles to suit, by 



