de three inches wide. B nection to the boiler. This instrument may be attached so shows the valve as it is locked in a case (the whole hight of that the water in it will be on the same level as in the boil- is a copper float five inches long and two inches diameter the holder and cover being about… … requested a blacksmith to try the experi- either case... By pressing on the knob, I, the whistle is sound- point of connection asin Fig.1. The operation is similar to ment, a piece of very tovgh iron was hammered with a mod- ed at pleasure. the others, and will be readily understood without further…
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