Inside Out Library · Explore

Scientific American, Vol. 89, No. 25 (1903) (1903)

leaf 11

An illustration from Scientific American, Vol. 89, No. 25 (1903), 1903, leaf 11
ed shank of the mouthpiece, and it studies might be very profitably applied to improve the herewith. The improved shade has approximately is firmly held between a shoulder on the mouthpiece telephone. At that time I was engaged in commercial the form of a pair of spectacles, being held to the and… … States, and its validity be as open and undetermined a vention the voice had to vibrate a diaphragm against EYE SHADE. question as it was prior to the bringing of the first suit a magnet, and the volume of electricity thus produced upon it. It is only by a combination of very unusual was not…

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 89, No. 25 (1903)

More like this