yton, Ohio. tional elevation, with scale attached; Fig. 2, a vertical section ;Fig. 3, section through the line, X, and Fig. 4, a sectionthrough the line, Y. The parts are as follows: A is a cast iron tube, with acast top, screwed on or off by the inspector, and locked andsealed by him. The inside… … scribed. The screw or steam governor, by which the tensionof the spring is regulated, according to the age and estima-ted strength of the boiler, is not shown. The whistles, withthe cap supporting them, are also not shown, the principles ofthe instrument being better indicated without them. Thegage…
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