correctly registering the actualpressure of steam in boilers is of the utmost conse.quence, pecuniarily and physically. By keeping thesteam at a stated pressure fuel is saved, and the wearand tear of the boiler is much less where the work isregular and even than where rapid firing takes placeto run… … at all times under similar circumstances, and are,therefore, unreliable for any practical purpose. Weillustrate herewith a steam gage on an improved plan,which possesses decided advantages over many in use;the lower part of the gage is cut away to show itsinternal construction :—The brass cup, A,…
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