Kirkman, Marshall M. (Marshall Monroe), 1842-1921 · New York and Chicago, The World railway publishing company · leaf 139
Fig. 12. Flat Top Muffler Valve with Lever. Fig. 13.Round Top Muffler Valve without Lever. pop valve is that the noise of the escaping steam isreduced to the lowest possible minimum; the steam isdischarged upwards and with sufficient force to directthe current above the top of the locomotive cab,…
Locomotives
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