Du Monsel T., author. F. Pavlenkov and V. Cherkasov, translation. Telephone, m

Du Monsel T., author. F. Pavlenkov and V. Cherkasov, translation. Telephone, microphone and phonograph In Russian (ask us if in doubt)/Dyu Monsel' T., avtor. Pavlenkov F. i Cherkasov V., perevod. Telefon, mikrofon i fonograf The book was published a couple of years after the American scientist and entrepreneur Thomas Edison registered a phonograph with the Bureau of Inventions, and the Scotsman Alexander Bell patented the telephone. Around the same time, P.M. Golubitsky developed the first Russian phone of original design. The book describes the theory of the phone, describes the characteristics of the first devices, including historical models such as the Teague phone, Varey and Fiche microphones, Edison's simple coal phone, and many others. The book was written by the French physicist, academic, and electricity researcher Theodore du Monsel, one of the first authors of books on telegraphy. We have thousands of titles and often several copies of each title may be available. Please feel free to contact us for a detailed description of the copies available. SKUalb6adabc24dc2d4cb5