upwardly extending: screw rod, on which screw cone- pictures may be obtained. : shaped nut collars adapted to hold the knife to be ground in place on the screw rod, so that the knife Cambridge, Mass. _turns slowly with the bevel gear wheel when the main [Bromide prints sent by Professor Pickering… … heated, raises to a comfortable thermal condition a the front and fastened by buttons or loops, and in con- room 10X30 feet in dimensions. The heat is raised or nection with this covering is used an inner cape, com- terial, is operated by the large gear wheel, provided lowered as desired by…
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