Who invented the Telephone?

It was invented, almost simultaneously, by Alex. Graham Bell, a
native of Scotland, and Professor of Vocal Physiology in the Boston
University, and Elisha Gray, of Chicago.


What is a Phonograph?

It is an instrument for recording the vibrations of sounds, and
consists of a revolving cylinder covered with tin-foil. To this
cylinder is attached a mouth-piece, fitted with a thin plate or disk,
on the outer side of which, next to the cylinder, is a needle or
point. The cylinder runs on a screw, so that the whole length of it,
from end to end, may pass under the point. On speaking into the
mouth-piece the voice causes the disk to vibrate, and the point to
trace marks corresponding to these vibrations on the tin-foil. By
turning the cylinder so that the point again passes into the marks in
the tin-foil, the sounds that entered at the mouth-piece can be
reproduced at any time.


By whom was the phonograph invented?

By Thomas A. Edison, who was born in Ohio in 1847. Mr. Edison is the
inventor of many improvements in telegraphy, which have been adopted
into general use, and are to him the source of a large income. To him,
also, we are indebted for the megaphone, microphone, tasimeter, an
improvement in the telephone, a system of electric lighting, and many