49 



open air. It consists of & 

 tin-lined wooden cylinder a 

 between which and a cor- 

 rugated cylinder is a per- 

 forated steam coil o with 

 ;-team entering at h, thus 

 heating the water to the de- 

 sired temperature read off on 

 the thermometer b. The over- 

 flow water escapes at p and 

 is emptied at n. 



The milk flows from the 

 tank x on to the curved 

 cover which is perforated so 

 as to distribute the milk 

 evenly on the inside of the 

 corrugated cylinder from 

 whence it flows to the bot. 



torn and out by i find k, the thermometer m showing the 



temperature. 



Dr. Fieischnian heated 1,250 Ibs. of milk per hour from 66 



to 140 Fah. with the heating water only 158. 



Thiel used a similar constructed cooler, but of course any 



kind of cooler can be used. 



Kelch's (Germany) heater and cooler is show r n in Fig. 46 ? 



with a sectional view in Fig. 47. It consists of two cylinders 



A and B, the latter set in the former. The narrow space be- 



tween them K is used for either heating or cooling the milk 



Fig. 46. 



