8 CASEIN. 



in the figure, leading to the different utensils. The pipe (c), 

 which extends to within four inches of the bottom of the 

 boiler, serves a dual purpose. In the first place, it acts as 

 a safety valve, the water being forced out if the internal 

 pressure becomes excessive owing to obstructions in the out- 

 let pipes. Secondly, if the boiler is not kept properly filled, 

 steam will escape through this pipe as soon as the water 



FIG. 4. Steam Generator. 

 (7= Pipe to Casein Pan. A = Steampipe. E = Washer. D = Fodder 

 Steamer, r = Extra Branch.) 



level sinks below the mouth, an indication being thus given 

 that the water is low. The piece marked (d) is a ground 

 block of iron, fitting into a large opening, through which 

 the boiler is cleaned out. It also acts as a safety valve in 

 the event of the pipe (c) getting choked. Hot water can be 

 drawn from the boiler through the tap (/), which may also 

 be used for the introduction of flushing water when the 



