. Scientific American Volume 90 Number 16 (April 1904) . use Protector place check or»blotter, draw or push roller over figures so as to per-forate check, as shown above. By Mail 25 Appliance Co., 869 Broadway, New York. Computing Figures mentally is probably thehardest kind of toil Comptometer makes iteasy, is twice as quick, in-sures accuracy ana relievesall mental and nervous dont you get one ?Write for Pamphlet, FELT & TARRANT MFCS CO. 62^6 Illinois St., Chicago. THE LOCKE ADDER ^ | CAPACITY 999,999,999 The 86 calculating machine^c which do

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. Scientific American Volume 90 Number 16 (April 1904) . use Protector place check or»blotter, draw or push roller over figures so as to per-forate check, as shown above. By Mail 25 Appliance Co., 869 Broadway, New York. Computing Figures mentally is probably thehardest kind of toil Comptometer makes iteasy, is twice as quick, in-sures accuracy ana relievesall mental and nervous dont you get one ?Write for Pamphlet, FELT & TARRANT MFCS CO. 62^6 Illinois St., Chicago. THE LOCKE ADDER ^ | CAPACITY 999,999,999 The 86 calculating machine^c which does more work thanI the most expensive. Adds jI 9 columns at once. Hub-^| tracts— Sim AlumiriumModel $tQ0 0 I pie, rapid, I handy. ^cua£ It i CannotIr make mis ftakes-lifetime. a all you claim for it. I A. R. HARPER, Danville,lll. I We highly recommend it.—J AS. 3 WALLACE & SON, Parnassus, Pa. i 8ize4xlQ;&inches. Price8>.00| prepaid in the U. S. Write! for Free booklet. Agents wanted.; ^. B1F6. tO.,35 WalnotSt.,Kensett,la. |

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