. American engineer and railroad journal . al costwas $ The average cost per cubic inch would thus be$ With the oxy-acetylene cutting torch, 135 cubic inches 64 AMERICAN ENGINEER AND RAILROAD JOURNAL. February, 1911. were cut per hour. The labor was cstimaled at 25 cents per acetylene at one cent per cubic foot and the oxygen at twocents. The e.\pense per cubic inch of steel was found to be$, or but little over half that with the saw. The foregoingdata are based on results at a plant where steel castings are madeIt is important in the application of the cutting proce
. American engineer and railroad journal . al costwas $ The average cost per cubic inch would thus be$ With the oxy-acetylene cutting torch, 135 cubic inches 64 AMERICAN ENGINEER AND RAILROAD JOURNAL. February, 1911. were cut per hour. The labor was cstimaled at 25 cents per acetylene at one cent per cubic foot and the oxygen at twocents. The e.\pense per cubic inch of steel was found to be$, or but little over half that with the saw. The foregoingdata are based on results at a plant where steel castings are madeIt is important in the application of the cutting process, justas in the welding procedure, to select the proper size of tip forthe work. Thus, the smallest heating tip (No. 00) consumesonly cubic feet of acetylene per hour, while the largest size(No. 12) consumes cubic feet. The amounts of canbe estimated from these figures by remembering that in theneutral flame (i. one that neither oxidizes nor carbonizes)the oxvgen must be furnished in the ratio of to i. We have. Area in Sq. In. Time in Min. .75 Sq. In. per As to the amount of oxygen used, we may take the figuresobtained after 16 miscellaneous cuts. The total area cut amountedto square inches. The total amount of oxygen used, boththrough cutting and heating tips, amounted to cubic feetWe find then that it requires cubic feet of oxygen persquare inch. The total acetylene may be estimated at 4 cubicfeet. With acetylene at i cent and oxygen at 2/2 cents, the totalexpense for gas would be $ Per square inch, the gas costwould be $ If we estimate the labor at $ per squareinch, we get for gas and labor a total expense of $0,007 per?quare inch. THE PENNSYLVANIAS RELIEF FUNDS CUTTING OFF STEEL PILING. the cubic feet of oxygen per hour for tip No. 00, and feet per hour for tip No. 12. Remembering that acetylenecosts about I cent per cub
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