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A miniature diving bell, showing how a condensing pump can supply air to an inverted vessel surrounded by water, the excess air escaping as bubbles from the bottom
ARP23A15_335

A miniature diving bell, showing how a condensing ...

Sinking a mineshaft by Triger's method, 1841
ARP07112_009761P

Sinking a mineshaft by Triger's method, 1841

Diving bell supposed to have been used by Alexander the Great
ARP07113_010360P

Diving bell supposed to have been used by Alexande...

Equilibrium and the movement of the air
ARP07103_460000358

Equilibrium and the movement of the air

Charles Babbage
ARP07096_390001818

Charles Babbage