, A, the beds of marl with and the pins, B, the bench which the gypsum is asso- is moved forward a certain ciated; the lime, as a sul- distance, when the lever, phate, occupying more A, is acted on. space than it did in its The boring mechanism original state asa carbon- seen protruding through… … set up tight by the screw in KLAHR’S BORING AND MORTISING MACHINE. stone or Zechstein. In the the supporting arm, H, United States this calca- which bears against the slotted arm. The gagefor|these facis in relation to gypsum, or plaster of| reous salt occurs in numerous lenticular masses in…
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