Projection engineering (Sept 1929-Nov 1930)

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IlM@IMSBSlt#® Western Editor Evans E. Plummer Hollywood Editor J. Garrick Eisenberg Editor Donald McNicol Associate Editors James R. Cameron Austin C. Lescarboura 1NIIIIIIIIIIIII|.||llllllll!llllllllllillllNIII!llll|l|i|i'||INII|||W ;i[llllllllll!lllllllllll[:illlllll!|IJIIIIIIill:llinill!!!IIIIIIIINIIl!llll!llll!lllli!llllli;ll!llllllll!llllllllllllllllllIllllllllllllllllllll Vol. II JUNE, 1930 Number 6 CONTENTS Editorial 4 S. M. P. E. Convention at Washington 7 A Sound Printing Attachment for the Model D Continuous Printer By Joseph A. Dubray 10 The Condenser Reproducer By C. D. Feak 12 Radiovision Bids for Public Favor By Austin C. Lescarboura, Associate Editor 15 The Chief Problems of Television By George H. Robinson 17 Trouble Shooting in Amplifiers By Jas. R. Cameron, Associate Editor 18 Projection Advisory Council Honors N. D. Golden By Jas. R. Cameron 20 Radio Vouches for Authenticity of Signature By S. R. Winters 21 Excellence in Auditoriums By W. A. McNair 22 Cellulose Nitrate and Acetate Film • • By A. H. Nuckolls 24 Recent Developments in Talking Pictures By William McKay 26 Battling with the Odds of Visual Radio By 8. R. Winters 28 Powerizer Sound System Equipment 30 Departments News of the Industry and New Developments 34 Index to Advertisers 38 ■ "i ', Published Monthly by Publishing Aviation Engineering Radio Engineering Projection Engineering Entered as second-class matter October 9, 1929, at the post office at Albany, N. Y., under the Act of March 3, 1879. Bryan Davis Publishing Co., Inc. 52 Vanderbilt Ave. New York City Publication Office — North Broadway, Albany, New York Representatives Chicago Office — 333 N. Michigan Ave., Charles H. Farrell, Mgr. Cleveland Office — 10515 Wilbur Avenue, James C. Munn, Mgr. St. Louis Office— 505 Star Building, F. J. Wright Kansas City Office— 306 Coca Cola Building, R. W. Mitchell San Francisco Office — 318 Kohl Bldg., R. J. Birch Los Angeles Office — 846 S. Broadway, R. J. Birch Bryan S. Davis, President James A. Walker, Secretary Sanford R. Cowan Advertising Manager Yearly subscription rate $2.00 in U. S. and Canada; $3.00 in foreign countries.