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This 1870s illustration explains Parallel Motion as understood by James Watt, the Scottish inventor
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This 1870s illustration explains Parallel Motion a...

The Magdeburg hemispheres.
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The Magdeburg hemispheres.

The Magdeburg hemispheres.
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The Magdeburg hemispheres.

Double action air pump with a single oscillating cylinder.
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Double action air pump with a single oscillating c...

Manual air pump.
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Manual air pump.

Air pump with two cylinders and valves.
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Air pump with two cylinders and valves.

Section of an air pump with two cylinders and valves.
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Section of an air pump with two cylinders and valv...

Air pump with two cylinders and valves.
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Air pump with two cylinders and valves.

Piston valves Air pump with two cylinders.
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Piston valves Air pump with two cylinders.

Air Pump Double Action, a longitudinal section of the cylinder and piston.
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Air Pump Double Action, a longitudinal section of ...

Lessons With Demonstration Of The Air Pump
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Lessons With Demonstration Of The Air Pump

Leg saver. Chester Antos, student at Georgetown University medical school, photographed with the newly devised Emerson suction pressure apparatus which designers believe will prevent amputation in man...
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Leg saver. Chester Antos, student at Georgetown Un...

Two-stemmed air pump from the year 1870 / Zweistielige Luftpumpe aus dem Jahre 1870
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Two-stemmed air pump from the year 1870 / Zweist...

British Arctic Expedition of 1875-1876
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British Arctic Expedition of 1875-1876

The fire in the building of moscow tire plant that broke out in the store-room of rubber is almost put out, eight water tanks, two hydrolic lifts and 15 air-pumps continue to work on the site,a helico...
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The fire in the building of moscow tire plant that...

Snaps 1895
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Snaps 1895

An American Ballerina
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An American Ballerina

Noctua, Corvus, Crater, Sextans Uraniæ, Hydra, Felis, Lupus, Centaurus, Antlia Pneumatica, Argo Navis, and Pyxis Nautica 1825
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Noctua, Corvus, Crater, Sextans Uraniæ, Hydra, Fel...

Fueling The Splitdorf
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Fueling The Splitdorf

USS Pennsylvania Dive Crew
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USS Pennsylvania Dive Crew