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The Magdeburg hemispheres.
UMG23A59_108

The Magdeburg hemispheres.

The Magdeburg hemispheres.
UMG23A59_107

The Magdeburg hemispheres.

Double action air pump with a single oscillating cylinder.
UMG23A00_034

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

Manual air pump.
UMG23A00_035

Manual air pump.

Air pump with two cylinders and valves.
UMG23A00_032

Air pump with two cylinders and valves.

Section of an air pump with two cylinders and valves.
UMG23A00_043

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

Air pump with two cylinders and valves.
UMG23A00_033

Air pump with two cylinders and valves.

Piston valves Air pump with two cylinders.
UMG23A00_042

Piston valves Air pump with two cylinders.

Air Pump Double Action, a longitudinal section of the cylinder and piston.
UMG23A00_031

Air Pump Double Action, a longitudinal section of ...

Lessons With Demonstration Of The Air Pump
UMG22A64_084

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...
UMG21A22_493

Leg saver. Chester Antos, student at Georgetown Un...

Two-stemmed air pump from the year 1870 / Zweistielige Luftpumpe aus dem Jahre 1870
UMG21A09_386

Two-stemmed air pump from the year 1870 / Zweist...

British Arctic Expedition of 1875-1876
UMG20B25_418

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...
UMG20B07_192

The fire in the building of moscow tire plant that...

Snaps 1895
UMG20A45_050

Snaps 1895

An American Ballerina
UMG20A11_422

An American Ballerina

Noctua, Corvus, Crater, Sextans Uraniæ, Hydra, Felis, Lupus, Centaurus, Antlia Pneumatica, Argo Navis, and Pyxis Nautica 1825
UMG20A00_225

Noctua, Corvus, Crater, Sextans Uraniæ, Hydra, Fel...

Fueling The Splitdorf
UMG20A17_333

Fueling The Splitdorf

USS Pennsylvania Dive Crew
UMG20A12_349

USS Pennsylvania Dive Crew