Period

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A radiometer invented by William Crookes
ARP23A15_427

A radiometer invented by William Crookes

A radiometer invented by William Crookes
ARP23A15_282

A radiometer invented by William Crookes

A spinthariscopic invented by William Crookes
ARP23A15_429

A spinthariscopic invented by William Crookes

A radiometer invented by William Crookes
ARP23A15_428

A radiometer invented by William Crookes

A radiometer invented by William Crookes
ARP23A15_265

A radiometer invented by William Crookes

A radiometer invented by William Crookes
ARP23A15_264

A radiometer invented by William Crookes

A Ransomes, Sims & Jefferies combined plough and rotary harrow
ARP23A13_488

A Ransomes, Sims & Jefferies combined plough and r...

Rotary Snow Plough for Railways, Canada
ARP15A05_429

Rotary Snow Plough for Railways, Canada

Battery of Furnaces
ARP18A07_448

Battery of Furnaces

James Watt's
ARP07103_460000769

James Watt's

Steam engine by James Watt
ARP07105_460001798

Steam engine by James Watt

Helicopter(1928) designed by Spanish engineer Juan de la Cierva (Cordoniu) 1896-1936
ARP07094_390000727

Helicopter(1928) designed by Spanish engineer Juan...

Putting ball of white-hot iron into a rotary squeezer
ARP07094_390000646

Putting ball of white-hot iron into a rotary squee...