sfully com- on a piston rod, which extends through a crosshead peting with coal in localities where coal is readily ob- tachment for bits, which will accurately gage the at the top of the main frame. A nut on the piston depth of the bore. This gage may be set to a certain tained. Even in Germany,… … The furnaces are vertical and are air-tight. The shank, the clamp may absolute mean, 43.8; normal, 43.7; average daily ex- DEPTH GAGE FOR peat, therefore, passes through them without coming be secured at any de- cess compared with mean of 35 years, +0.1. Warmest BRACE BITS. into contact with the…
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