. Transactions of the Society of Motion Picture Engineers (1921) . ins 69 The Use of Artificial Illuminants in Motion Picture Studios. By L. A. Jones 74 Actinic Measurements on Exposure and Tinting of Motion Picture Film. By W. E. Story, Jr 106 Need for Improvement in Present Practice as Regards Film Reels. By F. H. Richardson 116 The Protection of Inventions. By Thomas A. Howard 123 Testing and Maintaining Photographic Quality of Cinematographic Emulsions. By A. B. Hitchins 136 The High Intensity Arc Lamp. By A. D. Cameron 152 Report of Nomenclature Committee. 160 Report of Standards Committe
. Transactions of the Society of Motion Picture Engineers (1921) . ins 69 The Use of Artificial Illuminants in Motion Picture Studios. By L. A. Jones 74 Actinic Measurements on Exposure and Tinting of Motion Picture Film. By W. E. Story, Jr 106 Need for Improvement in Present Practice as Regards Film Reels. By F. H. Richardson 116 The Protection of Inventions. By Thomas A. Howard 123 Testing and Maintaining Photographic Quality of Cinematographic Emulsions. By A. B. Hitchins 136 The High Intensity Arc Lamp. By A. D. Cameron 152 Report of Nomenclature Committee. 160 Report of Standards Committee 163 Special Items and Announcements 164 Advertising Section Index of Papers and Authors 1916-1921 I Number Thirteen MEETING OF OCT. 31. NOV. 1, 2 and 3, 1921BUFFALO, N. Y. Idf^^iJT Page 20 ERRATA Formula on following pages should read: X • ^1 I L = = — 4 d 6 Paee 76 Page 77 4. VISIBILITY (Va,) of radiation of a particular wavelength (2) Page 91 Page 94 b dF dS The approximate formula is Nx TC Bo 4S2 2S2 u ... Ex (min.) 1 Bo (mm.) = t -Z ^ W7 (15). TRANSACTIONS OF THE SOCIETY OFMOTION PICTUREENGINEERS Number Thirteen MEETING OF OCT. 31, NOV. 1. 2 and 3, 1921BUFFALO, N. Y. 2dc^^ < Papers or abstracts may be reprintedif credit is given to the Society ofMotion Picture Engineers. The Society is not responsible for thestatements of its individual members. Copyright, 1922, by Society of Motion Picture Engineers 1/ MAy -e.:]?? ©CU686049 N OFFICERS 1921-22 Vice-PresidentR. P. BurrowsCleveland, Ohio PresidentL. C. Porter Harrison, N. J, Vice-PresidentGeorge A. BlairRochester, N. Y. SecretaryA. R. Bennington Bloomfield, N. J. Past PresidentsC. Francis Jenkins (Founder)Washington, D. C. TreasurerWill C. SmithNew York City H. A. CampePittsburgh, Pa. Board of Governors TJie President The Secretary The Treasurer M. W. Palmer, Long Island City, N. R. MoTT, Long Island City, N. Y. J J. H. McNabb, Chicago, 111. The Past President ^ Andrew Goretta COMMITTEES1921-22 Advert
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