907. EXPERIMENTAL WORK. Classified Advertisements A POSITIVE CLUTCH EXPERIMENTAL AND MODEL WORK, light spe- cial machinery and tools, electrical and mechanical in- Advertising In this column is 50 cents a line. No less struments, and apparatus; goods in quantity at low than four nor more than ten… … 858,810 Park Avenue, New York. 858305 Valve, tapping, L. W. Gates Valves on explosive engines, mechanism for NEW CONCRETE BLOCK MACHINE, $860. Easily automatically operating exhaust, J. D. six hundred 16 inch blccks per day. Same machine 859,127 S-, berzahn makes bricks, all different kinds, sizes,…
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