Collins, A. Frederick (Archie Frederick), 1869- · Boston, Small, Maynard and company · leaf 151
gauge to it. Calibrating the Dial.—To calibrate the gaugeyou have made, that is to graduate the face of it,or dial as it is called, you must borrow an accu-rate gauge and fix it in the boiler together withyour own. As the pressure rises in the boiler you simply 136 The Boys Book of Engine-Building… … LOCH NUT ■ELBOW RUBBERWASHER LOCKNUT GLASSTUBE &- TH/SENDF^52-SCREWS INTOBOILER S55S ^wvs^, 0 L RUBBER.WASHER -ELBOW Fig- S3- Cross Section of a Water Gauge blowing up for the want of water, you must fitit with a water gauge. This is a piece of glasstubing set into two elbows, one of which is…
Steam-engines
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