Il 
SICIUAIN (CIE. 
Vol. XXIII. No. 573 
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THE 
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Address: 
©The Electrical Engineer, 
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THE 
Amenean bell Telephon 
COMPANY. 
125 MILK ST., BOSTON, MASS, 
This Company owns the Letters - Patent 
No 186.787, granted to Alexander Graham 
Bell, January 30th, 1877, the scope of which 
has been defined by the Supreme Court of 
the United States in the following terms: 
‘“The patent itself is for the mechanical 
structure of an electric telephone to be used 
to produce the electrical action on which the 
first patent rests. The third claim is for the 
use in such instruments of a diaphragm, 
made of a plate of ircn or steel, or other ma- 
terial capable of inductive action; the fifth, 
of a permanent magnet constructed as de- 
scribed with a coil upon the end or ends 
nearest the plate; the sixth, of a sounding 
box as described; the seventh, of a speaking 
or hearing tube as described for conveying 
the sounds; and the eighth, of a permanent 
magnet and plate combined. The claim is 
not for these several things in and of them- 
selves, but for an electric telephone in the 
construction of which these things or any of 
them are used.”’ 
»This Company also owns Letters-Patent 
No. 463,569, granted to Emile Berliner, No 
vember 17, 1891, for a combined Telegraph 
and Telephone, and controls Letters-Patent 
No. 474,231, granted to Thomas A Edison. 
May 38, 1892, for a Speaking Telegraph, 
which cover fundamental inventions and 
embrace all forms of microphone transmit. 
ters and of carbon telephones. a 
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THE MODERN MALADY ; or, Suf- 
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An introduction to public consideration, 
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