often the entrance of steam into one or the other side. At the necessitated, an engine rated at tll Fie. 2. | - Tl Al ‘vonk |) van 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… … exclusive of bolts; and finally that it rarely requires re- The first operations in the excavation are designed to be ac- complished by the machine shown in elevation and plan in pairs, and then but such asare easily and inexpensively Figs. 2and 3. This is a single powerful engine geared to a…
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