SwKK'i'iiNiiD Cond1':ns:';d Milk — Striking 



93 



Sampling of Batch. — The samples can be drawn from the 

 pan by operating- the two valves at the bottom explained under 

 "Description of Vacuum Pan." While the milk is condensing, 

 the partial vacuum in the pan makes impossible the drawing ofT 

 of the sample by simply opening the outlet. Instead of causing 

 the milk to come out, air would rush in with violent force and 

 would cause the milk in the pan to be thrown over into the con- 



Fig. 27. A con- 

 venient device 

 for sampling 

 the condensed 



mill< in the pan 



Courtesy of 



Arthur Harris 



& Co. 



Fig. 28. A convenient device for sampling 

 condensed milk in the pan 



Courtesy of Arthur Harris & Co. 



denser, besides dangerously jolting the machinery. For this reason 

 the outlet is equipped with two valves, both of which are closed dur- 

 ing the condensing process. For taking samples, open the upper 

 valve. This allows the condensed milk to run into the nipple 

 between the two valves. Now close the upper valve and open 

 the lower one. The milk v^'ill run out freely. The first sample 

 should be rejected, as it may contain water caught in the nipple. 



For greater convenience and increased rapidity of sampling, 

 especially constructed sample testers or striking cups, attached 

 to the side of the body of the pan may be used. The latest in- 



