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A pseudoscope, a binocular optical instrument that reverses depth perception
ARP23A15_419

A pseudoscope, a binocular optical instrument that...

A pseudoscope, a binocular optical instrument that reverses depth perception
ARP23A15_353

A pseudoscope, a binocular optical instrument that...

Peter Dollond
ARP09A00_106

Peter Dollond

David Brewster
ARP07113_010208P

David Brewster

Hevelius observing through refracting telescope
ARP07104_460001482

Hevelius observing through refracting telescope

John Herschel, William Herschel's telescope
ARP07096_390001516

John Herschel, William Herschel's telescope

Christiaan Huygens
ARP07096_390002062

Christiaan Huygens

Ernst Abbe
ARP07094_390000984

Ernst Abbe