rubber polishing of a barrow by means of pivoted handles at the rear end—not lent of, or is represented by 15 foot-pounds per minute. If 100 shown—which may be swung out of the way when the ma- feet of No. 18 pure copper wire be coiled into a helix and im- chine is in operation. Between upright… … oted to the uprights by a round bar, B, which serves also as cess to show it, but in use only one or more of the sections are cost of about 54 mills per hour per candle. a guide to the lower portion of the inner frame, C, in perform- The cost of gas light per candle per hour would be about ing a…
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