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Report of the Progress Committee 103
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. Chem. 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 38 (Oct. 6, 1928) p. 1071.
254. C. F. Jenkins, Trans. Soc. M. P. Eng. 12 No. 36 (1928) p. 915; also Eadio News 10 (Nov. 1928) p. 420.
255. Telephone and Telegraph Age 46 (Aug. 16, 1928) p. 363.
256. Rochester Democrat & Chronicle, Jan. 13, 1928.
257. F. Gray, Bell Tel. Labs. Reprint B-301 (Apr. 1928) ; also F. Gray, Bell Labs. Record 7 (Mar. 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; 299,076; 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) p. 580.
264. Kinotechnik 10 (Aug. 5, 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.
269. 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; 293,047; 293,048; 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. U. 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.