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Inventions
23
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Sound devices
8 photos
The telephone, the microphone & the phonograph
The Logical Machine
Breguet’S Tourbillon
Drawing from U. S. Patent
Part of the Drawings from U. S. Patent 186838
Patent Drawing of the Hopkins Watch
Remaining Drawings from U. S. Patent
Polarized Ringer
Type of Magneto Telephone
Fire Engine
Cash Register 2
Cash Register
Pedrail cimbing stairs
Pedrail
Microscope
Improved high speed engine and dynamo
Improved high speed engine and dynamo - fig 2
Cross-staff
High Pressure Blow-through Kier
Horizontal Drying Machine
The Mather Kier, cross section
Roller Washing Machine
Frick portable steam engine of 1877
Breech loading Gingal (Chamber out)
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