Moving Picture World (Jul-Sep 1911)

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THE MOVING PICTURE WORLD 623 Excellent Drawings. — Mr. J.J. Jones, Schenectady, N. Y., writes, sending in a large, very excellently executed drawing of various methods of hooking up resistance in series with an arc. While all this has been published in the department before, and much of it is contained in the handbook, still it may he of value to our newer readers. Therefore, and because Schenectady has taken so much pains with the work, I give the drawings space. Mr. Jones also sends circular of what seems to be a most excellent carbon holder of which he is the inventor. Stocks and Dies. — Baltimore, Md., writes: "What size stocks, dies and taps would you advise me to get for use in the operating room? I have read The World for two years and find it to be a great help." Well, Baltimore, it would depend on what kind of machine you might be using. Then, too, there are so very many different sizes of screws, with many different pitches of thread, used on mechanisms, lamps, etc., that it would take quite a stock to be of much practical use in repair work. As a matter of fact, I doubt the advisibility of the operator attempting fJ r 0 Ue Y Wire S" % 0 v: Direct Current (nC 1 T-r ,Ue y W> r e Wire "1 -W a.ier I 1 SipHo-. ?' p £ S r-^ >ar rells Wdter B a r r f 1 1 s c 0 >ni e c ! e 1 in 3 6 r i e S ll CONNECTIONS FOR TWO RheOSTATS CON M£L TE C IX MlIlPLl vVU»L< Supply Wires Lamp 3r T. J~. Tom c s. Sc»ri»f c t a u\ N V