The Telegrapher
O Box 5603. New York City. For the week ended September 30, 1873, and bearing Uiat date. No. 143, 340.a Ciecuit Closeh and Circuit for ... An automatic circuit closer, having conductors for a single transmitter, in combination with a device for adjusting the same to the different ... The lever detent g, resting against or upon a bulb containing quicksilver or other expansible liquid, oragalimt a spring controlled by .... Automatic Mercury Fire Alarm, for Hotels, Steamships, Public Buildings.
| Title | : | The Telegrapher |
| Author | : | |
| Publisher | : | - 1873 |
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