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(202) Bell System Tech. J. 8 (Jan. 1929) p. 135.
(203) Trans. Soc. M. P. Eng. 12 No. 35 (1928) p. 853.
(204) Exhib. Herald and Mo v. Pict. World 93 Sect. 2 (Oct. 27, 1928) p. 76.
(205) J. G. Uzmann, Mot. Pict. Projectionist '2 (Oct. 1928) p. 7.
(206) Mot. Pict. News 38 (Dec. 1. 1928) p. 1657.
(207) Mot. Pict. News 39 (Jan. 12, 1929) p. 102; Trans. Soc. M. P. Eng. 12 No. 35 (1928) pp. 867 and 872; Exhib. Herald and Mov. Pict. World 92 Sect. 2 (July 7, 1928) pp. 19-22; ibid. 93 Sect. 2 (Oct. 27, 1928) p. 19; Bioscope Supp. 76 (Sept. 26, 1928) pp. XXII J Mot. Pict. Projectionist 1 (March 1928) p. 7; ibid.
1 (Apr. 1928) p. 33; 1 (June 1928) p. 9; 1 (July 1928) p. 27.
(208) Mot. Pict. News 38 (July 7, 1928) p. 31.
(209) U. S. Pats. 1,673,217; 1,674,946; 1,675,122; 1,678,568; 1,695,414; Brit. Pats. 289,447; 289,448; 292,462; 292,610; 293,380; 294,558; 295,378; 299,894; Fr. Pat. 635,538; Ger. Pat. 455,084.
(210) Trans. Soc. M. P. Eng. 12' No. 36 (1928) p. 1034.
(211) Brit. Pat. 297,941; Fr. Pats. 635,835; 036,175 ; Ger. Pat. 463,813.
(212) Trans. Soc. M. P. Eng. 12 No. 34 (1928) p. 406; ibid. 12 No. 36 (1928) p. 1068.
(213) Trans. Soc. M. P. Eng. 12. No. 36 (1928) p 1184.
(214) Mot. Pict. News 38 (Aug. 4, 1928) p. 369; also Kinotechnik 10 (Feb. 20, 1928) p. 109.
(215) Trans. Soc. M. P. Eng. 12 No. 36 (1928) p. 1193.
(216) U. S. Pats. 1,673,250; 1,673,251 ; 1.673,252; 1,685,646; 1,687.193; 1,688,607; 1,689,266; 1,690,770; Brit. Pats. 287,274; 290,372; 292,113; 293,630; 296,669; Fr. Pats. 634,197; 635,841; 636,312; 636,495; 637,220; Ger. Pats. 462,884; 464,509; 465,066.
(217) Kine. Weekly 140 (Oct. 4, 1928) p. 77.
(218) Trans. Soc. M. P. Eng. 12 No. 36 (1928) p. 1175.
(219) New Phot. 11 (July 7, 1928) p. 349.
(220) U. S. Pats. 1,667,724; 1,684.968; 1,689,802; Fr. Pat. 638,055; Ger. Pat. 458,142.
(221) Exhib. HeraM-World 93 (Dec. 1, 1928)
p. 29.
(222) Kine. Weekly 134 (April 26, 1928) p. 65.
(223) U. S. Pats. 1,672,656; 1,676,553; 1,686.880; Brit. Pats. 294,850; 295,400; 295,581; Fr. Pat. 637,641; Ger. Pat. 455.288.
(224) A. O. Gibbons, Kine. Weekly 141 (Nov. 1, 1928) pp. 35-7.
(225) Exhib. Herald and Mov. Pict. World 93 Sect. 2 (Dec. 22, 1928) p. 11; ibid. 94 Sect.
2 (Mar. 16, 1929) p. 15.
(226) Movie Makers 3 (July 1928) p. 441.
(227) Mot. Pict. News 38 (Dec. 1, 1928) p. 1668.
(228) Exhib. Herald and Mov. Pict. World 93 Sect. 2 (Dec. 22. 1928) p. 9.
(229) Mot. Pict. News 38 (Aug. 4, 1928) p. 366.
(230) Exhib. Herald and Mov. Pict. World 92 Sect. 2 (July 7, 1928) p. 9.
(231) Trans. Soc. M. P. Eng. 12 No. 35 (1928) p. 823.
(232) Kine. Weekly 141 (Nov. 1, 1928) p. 9.
(233) U. S. Pat. 1.681,723; Fr. Pat. 637,145; Ger. Pat. 459,285.
(234) Bull. No. 18, Acad. M. P. Arts and Sci., Fan. 1929.
(235) Bull. No. 17, Acad. M. P. Arts and Sci., Dec. 1928.
(236) Ed. Screen 7 (Nov. 1928) pp. 229 and 23ft; ibid. (Dec. 1928) p. 268.
(237) Amor Cineniat. 9 (Nov. 1928) p. 16.
(238) Kinotechnik 10 (Feb. 5, 1928) p. 75.
(239) Kinotechnik 9 (May 30, 1927) p. 277.
(240) Mot. Pict. Projectionist 3 (Jan. 1929).
(241) Amer. Phot. 23 (Jan. 1929) p. 46.
(242) Movie Makers 3 (Nov. 1928) p. 728.
(243) Phot. Korr. 64 (Nov. and Dec. 1928) pp. 347 and 378.
(244) Trans. Soc. M. P. Eng. 12 No. 36 (1928) p. 1022.
(245) ( hem. Zeitung 52 (Mar. 24. 1928) p. 241.
(246) Sci. Amer. 140 (May 1929) p. 399.
(247) Phot. Korr. 64 (June 1. 1928) p. 183.
(248) Sci. Amer. 139 (Aug. 1928) p. 156.
(249) Trans. Soc. M. P. Eng. 12 No. 33 (1928) p. 140.
(250) Film Daily 46 (Dec. 12, 1928) p. 8.
(251) Inst. Rad. Eng. 17 (1929) p. 536.
(252) Popular Wireless 13 (June 30, 1928) p. 587.
(253) Mot. Pict. News 28 (Oct. 6, 1928) p 1071.
(254) C. F. Jenkins, Trans. Soc. M. P. Eng. 12 No. 36 (1928) p. 915; also Radio News 10 (Nov. 1928) p. 420.
(255) Telephone and Telegraph Age 46 (Auk 16, 1928) p. 363.
(256) Rochester Democrat & Chronicle, Jan. 13. 1928.
(257) F. Gray, Bell Tel. Labs. Reprint B-30: (Apr. 1928); also F. Gray, Bell Labs. Recoru 7 (March 1929) p. 276.
(258) Radio World 14 (Nov. 3, 1928) p. 14.
(259) Radio News 10 (Oct. 1928) p. 320
(260) Brit. Pats. 288,234; 291,029; 292,365: 294,671; 297,078; 2'99,076; 300,592; Fr. Pats. 633,854; 637,801; 638,092.
(261) H. Mueller, Kinotechnik 10 (Sept. 5, 1928) p. 462.
(262) Kinotechnik 10 (Dec. 5, 1928) p. 624.
(263) L. Fink, Kinotechnik 10 (Nov. 20, 1928) o. 580.
(264) Kinotechnik 10 (Aug. 5, and 20, 1928) pp. 409 and 432.
(265) Kinotechnik 10 (Sept. 20, 1928) p. 483; also Sci. Papers Inst. Phys. Chem. Res. (Tokyo) No. 149 (June 20, 1928) p. 247.
(266) Sci. Amer. 139 (Sept. 1928) p. 212.
(267) A. M. Jacobs, Photo-Era 61 (Oct. 1928) p. 229.
(268) Sci. Amer. 139 (Nov. 1928) p. 423; also Brit. Pats. 273,234 and 289,786.
(?69) Kinotechnik 9 (Aug. 5, 20, 1927) pp. 397 and 428.
(270) Schweiz, Photo-Ztg. 30 (June 1, 1928) p. 194.
(271) U. S. Pat. 1,680,619; Brit. Pats. 287,188; 287.388; 292,207; 292,631; 295,643; Fr. Pats. 637,392; 637,878.
(272) Licht Bild Buhne 21 (Oct. 6, 1928) p. 19.
(273) Brit. Pats. 287,488; 288,290; 289,864; 293.048; 293.047; 293,306: 294,493; 294,579; 295,313; 297,773; 298,242; Fr. Pats. 636,540; 638,372.
(274) Phot. Korr. 64 (June 1. 1927) p. 186.
(275) I'. S. Pats. 1,690,584; 1,696,739; Brit. Pat. 296,422; Ger. Pats. 455,047: 463,392.
(276) Trans. Soc. M. P. Eng. 12 No. 33 (1928) p. 140.
(277) Z. wiss. Phot. 26 (Oct. 1928) p. 171.
(278) Exhih. Herald and Mov. Pict. World 93 Sect. 1 (Nov. 24, 1928) p. 34.
(279) LT. S. Pats. 1,674,810; 1,677,310; 1,675,573; 1.679,695; 1,685.281; Brit. Pats. 288,146; 300,818; Fr. Pat. 633,305.
(280) Filmtechnik 4 (Oct. 13, 1928) p. 407; also Phot. Ind. 26 (Sept. 26, 1928) p. 1002.
(281) New Phot. 11 (May 19, 1928) p. 181.
(282) Phot. Dealer 42 (Nov. 1928) p. 528.
(283) New Phot. 11 (Mar. 5, 1928) p. 556.
(284) Movie Makers 3 (Nov. 1928) p. 738; also Filmtechnik 4 (Oct. 27. 1928) p. 427.
(285) Movie Makers 3 (Dec. 1928) p. 812; ibid. 4 (Jan. 1929) p. 886; Amat. Films 1 (Dec. 1928) p. 76.
(286) Movie Makers 3 (Nov. 1928) p. 739.
(287) Movie Makers 3 (Sept. 1928) p. 611.
(288) Movie Makers 3 (Aug. 1928) p. 536.
(289) Movie Makers 3 (July 1928) p. 477.
(290) Phot. Era 60 (May 1928) p. 307; Ed. Screen 7 (June 1928) p. 165.
(291) Sci. Amer. 140 (April 1929) p. 354.
(292) Movie Makers 3 (Dec. 1928) p. 774.
(293) Rev. franc. Phot. 8 (Oct. 15. 1927) p. 301.
(294) Brit. Pat. 297,995.
(295) U. S. Pat. 1,690,616.
(296) Mees, Camera Craft 35 (Sept. 1928) p 403; also J. Frank. Inst. 207 (Jan. 1929) pp. I -1 7; Capstaff and Seymour, Trans. Soc. M. I" Eng. 12 No. 36 (1928) p. 940.
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