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Robert Stirling Newall's25 - inch refractor on a 'German' equatorial mounting
ARP23A16_216

Robert Stirling Newall's25 - inch refractor on a '...

Refractor on a 'German' equatorial mounting
ARP23A16_217

Refractor on a 'German' equatorial mounting

The reconstruction of the likely method of mounting stone Age implements
ARP23A16_358

The reconstruction of the likely method of mountin...

The reconstruction of the likely method of mounting stone Age implements
ARP23A16_359

The reconstruction of the likely method of mountin...

Colour photograph of a World War Two North American Aviation Factory
ARP18A29_476

Colour photograph of a World War Two North America...

World War II 1939-1945
ARP11A02_280

World War II 1939-1945

Austrian artillery
ARP11A02_168

Austrian artillery

The Great Melbourne Telescope
ARP07113_010523P

The Great Melbourne Telescope

Hevelius observing with a wooden-tubed refracting telescope some 30 feet
ARP07113_010551P

Hevelius observing with a wooden-tubed refracting ...

Refracting telescope
ARP07113_010555P

Refracting telescope

How to construct a mounting for a refracting telescope
ARP07113_010556P

How to construct a mounting for a refracting teles...

Great Melbourne Telescope
ARP07113_010559P

Great Melbourne Telescope

Hydraulic jack
ARP07114_010843P

Hydraulic jack