44 



ward angle of 45. 

 These removed the 

 water condensed on 

 the drum quickly and 

 thus prevented it from 

 forming an insulating 

 layer on the drum, and 

 increased the capacity 

 fully fifty per cent. In 

 Fig. 35 is shown a re- 

 modelled Fjord heater 

 with 8 such rings. 



The second improve- 

 ment was the fixing of 

 an air cock (L. Fig. 35) 

 on the waterlock V. 

 This removes the air 

 which is carried into 

 the heating space with 

 the steam and which 

 accumulates there to 

 the detriment of the 

 heating capacity. 



The third improve- 

 ment was fixing six 



horizontal plates (P) Fig. 35. 



to the dasher (E) which also increase the capacity by prevent- 

 ing the mixing of the milk layers all having different temper- 

 atures. Take it altogether, such an apparatus with a milk 

 drum of 19 inc'hes diameter and a height from bottom to top of 



Fig. 34. 



the heatimg surface of 30 inches, will heat 8,000 to 10,000 Ibs. 

 per hour (the last amount: when the surface is clean) from 104 

 to 185 a wonderful result indeed. 



