334 Mr. Perkins’ Method of applying his New Invention 
out upon the graduated dial-plate the number of atmos- 
pheres under which the steam is generated. The pipes 
being in substance considerably thinner than any other patt 
of the apparatus, is intended to give way, in the event of 
the pressure within the generator being accidentally raise 
dange height ; the consequence ich would 
Bias in, TY 5 g, is the pi through which the water is ia- 
jected by the pump h, os the reservoir to the generator 3 
s the flue or chimney, from the furnaces below- 
