60 tuns of coal to a steam expands by increase of area until cut off by another pis- hight of 20 feet in eleven hours. ton. The point, however, to which we desire to call more di- At a warehouse in Washington rectattention, isthe valve,which, of the usual D shape,slides street in this city, where… … value in lifting blocks from quarries. Its arrangement is feet per minute. The boiler in this case was of the type such, it is claimed, as especially to fit it for ousdoor labor, as its working parts are all within the cylinder, and hence pro- tected. We are informed that it is made of but ten…
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