THOMA.S 



MANUFACTURING 



Manufacturer and 



Importer of 



Telegraphic, Kleetrle, 



Magnetic, Galvanic, Optl- 



eal, and Meteorological 



Instruments. 



Chemicals, Chemical 

 and Philosophical Ap- 

 paratus of all descrip- 

 tions. 



Illustrated Catalogues of 

 each department. 



Hall's Patent 



Medical Batteries. 



19 BROMFIELD ST., 

 BOSTON, MASS. 



1835, 

 DANIEL DAVIS, JR. 



1849, 

 PALMER & HALL. 



1856, 

 THOMAS HALL. 



HANDBOOK OF THE TELEPHONE. 



Everybody wants 



THE TELEPHONE: 



An Account of the Phenomena of Electricity, Magnetism, and Sound, as involved. 



in its action ; with directions for making a Speaking Telephone. By Prof. A. 



E. Dolbear, of Tufts College, author of "The Art of Projecting." i6mo. 



Illustrated. 50 cents. 



"An interesting little book upon this most fascinating subject, which is treated 

 in a very clear and methodical way. First, we have a thorough review of the 

 discoveries in electricity, then of magnetism, then of those in the study of sound 

 pitch, velocity, timbre, tone, resonance, sympathetic vibrations, etc. From 

 these the telephone is reached and by them in a measure explained." Hartford 

 Courant. 



LEE & SHEPARD, PUBLISHERS, BOSTON. 



ADAMS'S SOLAR CAMERA 



FOR TE ACHING GEOGRAPHY ETC. 



BETTER THAN TH 0T; STEREO Pf ICON 



CIRCULARS:FI^E;GHARLES F.ADAMS. - 

 ' STAT.E NORMAL-SCHOOL; AA/ORCEST ER: MAS s .' 



