. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature . disonstelephone patents as a means of working a telephone trans-mitter, and thus telephoning sounds which had been pre-viously recorded on the phonograph sheets. IL Telephonic iNsiKiTMEirrs. One of the best-known forms of the Keis telephone iashown infig. 1. The transmitter consists of a box A, provided with a month-piece M. In thetop of the box around hole is cutand across it amembrane S ofhoga bladder isstretched. A thinstrip of platinump fixed to the boxat one side of thehole and extend-ing to the ce
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature . disonstelephone patents as a means of working a telephone trans-mitter, and thus telephoning sounds which had been pre-viously recorded on the phonograph sheets. IL Telephonic iNsiKiTMEirrs. One of the best-known forms of the Keis telephone iashown infig. 1. The transmitter consists of a box A, provided with a month-piece M. In thetop of the box around hole is cutand across it amembrane S ofhoga bladder isstretched. A thinstrip of platinump fixed to the boxat one side of thehole and extend-ing to the centre of the membrane, supports at that point one foot of a light metaltripod cgf. One of the feet, e or /, rests in a cup containingmercury, which is in metallic connexion with the terminal h, whUe • Bee Proc. Roy. Soc, vol. xxvii. p. 362 ; Proc. Phys. Soc, vol. ii. ; Phil. Mag., 6thser., vol. vi. p. 44; Preece, Journ. Soa. Td. Eng.,vol. vii. p. 270. • Although this patent is dated prior to Hnghes^fl publications, it4oes not follow that the descriptions were filed before Fig. 1.—Eeias telephone. On this subject see A. G. Bell, PhU. Mag., 6th ser., vol. li. , and /oum. .Soc. Td, Eng., vol. ix. p. 404 ; Mercadier, Phil, Mag,,5th ser., vol. xi. p. 78 ; Tyndall, Proc. Roy. Soc, vol. xxxi. p. 307 ;Routgen, Phil, Mag,, 6th eer., vol. xL p. 308 ; Preece, Proc Roy. Soc,vol. xxxi. p. 596 ; Bayleigh, Nature, vol. xxiii. p. 274, and Proc, , 1877; Bidwell, PhU, Mag,, 6th ser., vol. xi. p. 302; S. P. Thomp-son, Phil. Mag., 5th ser., voL vi. p. 276. * See W. Smith, Journ. Soc. Tel. Eng., vol. v. p. 183, and vol. vi. ; M. L. Sale, Proc, Roy. Soc, vol. xxi. p. 283, and Phil. Mag., 4thser., vol. xlvii. p. 216 ; Draper and Moss, Proc Roy, Irish Acad,, p. 529; Eoase, Phil. Mag,, 4th ser., vol. xlvii. p. 161; W. G. Adams,Proc Roy, Soc, vol. xxiii. p. 635 and voL xxiv. p. 163 ; W. G. Adamsand B. E. Day, iiid., vol. xxv. p. 113; Werner Siemens, MonaUber. kS
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