_c^c<^ 1C2*3^=^ m^mm HillllHI ■cr<^«'5L>-5zr )f>^y^ [Entered at the Poet Offlce of New York, N. T..» Second Cla«§ Matter. Copyriiht. 1838. by Mnnn & Co.] A WEEKLY JOURNAL OF PRACTICAL INFORMATION, ART, SCIENCE, MECHANICS CHEMISTrj, AND MANUFACTURES^ Vol. LXXVIII.—IVo. 83. 1 NEW YORK, JUNE 4, 1898.… … I. A keyboard. S. Uetbod of wirlnK (be contact ban. 3. A monosTBm frame. 4. I^mp inclosed in nty-prot«ctor. 5. A key, Bbowioff contact pointB and bara. 6. DeUU of a coctacl point. 7. Diagram of keyboard and mooogram wiring. 8. System of fcroapinj; the lompa. 0. Another form of ray-protf>ctor. 10.…
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