54 



teurizing h eater 

 "REGENERA- 

 TIVE," is the result 

 of the European eco- 

 nomic spirit, and 

 makes the cold milk 

 cool the hot, while 

 the latter heats the 

 former, thus saving 

 both ice and coal. 

 The outside is made 

 of iron and is insu- 

 lated. Inside this are 

 two curved tinned 

 copper drums, which 

 fit into each other, 

 leaving a narrow 

 space for the milk to 

 pass. Fig. 53 shows 

 a sectional cut of the 

 heater closed while 



Fig. 53. Fig. 54 gives a gen- 



eral view of it, and Fig. 55 shows it opened for cleaning. In 

 order to keep the milk in motion while heating the drum con- 

 nected with the moveable side is revolved by aid of the pulley 

 shown. The milk enters at b, following the direction of the 

 arrows, is heated by steam entering through O into the fixed 

 drum, and when it reaches the 

 end of the heating surface the 

 thermometer shows the tem- 

 perature and it commences 

 the return trip and is cooled 

 by meeting the cold milk, leav- 

 ing the heater at e. The con- 

 densed water is removed at a. 

 The one with a capacity of 

 6,000 Ibs. per hour holds 372 

 Ibs. and there remains about 

 ISO Ibs. when the work is done. 

 This is drawn off by the cock 

 at d. The apparatus was test- 

 ed by the agricultural society 

 and shown to heat the milk 

 to 225 without changing its 

 color or giving it any pro- 



