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This illustration dates to before 1876. It shows the apparatus used for a ghost illusion, often
UMG25A05_329

This illustration dates to before 1876. It shows t...

Largest refracting telescope ever constructed 1900,
UMG20B28_278

Largest refracting telescope ever constructed 1900...

Mount Palomar Observatory
UMG20A12_317

Mount Palomar Observatory

The Treptow Giant Telescope
UMG20A12_337

The Treptow Giant Telescope

Berlin University Observatory
UMG20A12_335

Berlin University Observatory

Berlin University Observatory
UMG20A12_325

Berlin University Observatory

Mt. Palomar Observatory
UMG20A12_324

Mt. Palomar Observatory