Casson, Herbert Newton, 1869- · Chicago, A.C. McClurg & Co. · leaf 30
FIRST BELL TELEPHONES, PHOTOGRAPIIED FROMTHE ORIGINAL INSTRFMEXTS I\ THEPATENT OFFICE AT WASHINGTON H/hih … l-IKST EXCMANGI-; SWITIH KiiAftii wriH T^vl■:NT^■(•ir;(_TiTs Ei,iriPM;ii IN 187S THE HISTORY OF THE TELEPHONE class of deaf-mutes; and soon afterward the Bos-ton Board of Education wrote to Graham, offer-ing him five hundred dollars if he would come toBoston and introduce his system of teaching in…
Telephone
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