(1)-George B. Prescott- "The Speaking Telephone" published in 1884 by Appleton &

Company New York City NY. p 9, - p 13

(2)-Telegrapher May 22nd, vol. 5 No. 39, 1869 p 301- Editor Mr. Van Duzer

(3)-Du Moncel - Le Telephone Le Microphone Le Phonographe 1878 p 11

(4)-S. P. Thompson:"Phillip Reis Inventor of the Telephone" 1883, E. & F. Spon

(5)-W. H. Preece,F.R.S. & J. Maier, Ph. D. The Telephone 1889 p Whittaker & Co

(6)-Prof. A. E. Dolbear, The Telephone-Phenomena of Electricity, Magnetism, and

Sound as involved in action. 1877 Norwood Press

(7)-Legat's report, 1862 Zeitschrift

(8)-Dinglers's Polytechnisches Journal, vol. 168, p. 185.

(9)-Polytechnisches Centralblatt, 1863, pp. 857-9.

(10)-Dinglers's Polytechnisches Journal, vol. 169, p.399.

(11)-Die Fortschritte der Physik, 1863, p. 96. Cosmos, December 25, 1863.

(12)-Zeitschrift des Architectur und Ingenieur Vereins, vol. 12.

(13)-Proceedings of the Literary and Philosophical Society of Manchester 1865.

(14)-Pisko, Die neueren Apparate der Akustik, Vienna, 1865, pp. 94, et seq.

(15)-Electricity, by Ferguson, 1867, p. 257.

(16)-The Manufacturer and Builder, May, 1869, vol. 1, No. 5, pp. 129, 130.

(17)-Researches in Telephony,' Journal of Soc. of Telegr. Engineers, dec. 1877

(18)-A.G. Bell - In support of his plea: patent, No. 174,456,

dated March 7, 1876

(19)-A letter from J.J. Storrow to Alexander Graham Bell enclosing a copy of a

letter from Mr. Storrow to Mr. Scudder, relating to the Dolbear-Reis, Case..

June 28, 1883.

(20)-The letter form James J. Storrow. to Samuel H. Scudder-

June 28, 1883.