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An electronic device used to record Morse code on a roll of paper.

Morse Register

An electronic device used to record Morse code on a roll of paper.

An instrument for registering the vibrations of a sounding body.

Phonautograph

An instrument for registering the vibrations of a sounding body.

"A Phonograph is an instrument for recording and reproducing sounds, invented by Thomas A. Edison."—(Charles Leonard-Stuart, 1911)

Phonograph

"A Phonograph is an instrument for recording and reproducing sounds, invented by Thomas A. Edison."—(Charles…

A form of the phonautograph invented by Thomas A. Edison, by mean which sounds are made to produce on a register permanent tracings, each having an individual character corresponding to the sound it produces.

Phonograph

A form of the phonautograph invented by Thomas A. Edison, by mean which sounds are made to produce on…

"Seismoscope. a, heavy mass supported by loop at point near center of gravity; b, point on which upper side of loop rests; c, long needle projecting from upper side of loop; d, conducting-wire; e, binding-post; f, long arm of lever pivoted at k; g, point where end of lever rests on end of needle; h, mercury-cup." -Whitney, 1911

Seismoscope

"Seismoscope. a, heavy mass supported by loop at point near center of gravity; b, point on which upper…