ry to re-seat their valves. This can Imagine, further, the wheel immersed in a tub of water to The effect of such ignorance is suspicion and doubt. In be done only when the steam is down. The object of the somewhat more than half its diameter, its axle being sup- vain may meter inspectors test, and… … valve, E, is provided with a stem, J, of such ual practice this is accomplished by a very in- THOMAS’ genious arrangement. The pipe in the up a length that its end bears against the in- per inverted tub permits the discharged gas to escape from ner surface of the valve, G, except when the latter is…
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