The Observatory, Georgetown Univ., Washington, D. C.
Picryl description: Public domain photo of vintage Washington DC postcard, free to use, no copyright restrictions image.
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
California Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who a... More
National Observatory (North Front). Washington DC stereoscope card, 19...
Picryl description: Public domain image of a park, park architecture, outdoors, romantic atmospheric landscape, cemetery, free to use, no copyright restrictions.
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
California Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who a... More
Observatory, Univ. of Mich., Ann Arbor, Mich.
Picryl description: Public domain photo of vintage Michigan postcard, free to use, no copyright restrictions image.
Télescope parallactique de Merz et Mahler: détails relatifs au mouvem...
Public domain scan of an architecture diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Lick Observatory, San Jose, Calif.
Picryl description: Public domain photo of vintage California postcard, free to use, no copyright restrictions image.
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
California Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who a... More
Vassar College Observatory, Poughkeepsie, N.Y. New York Sterecope Card...
New York stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Astronomical observatory, Georgetown College, D.C.
Public domain illustrated book page scan, American, free to use, no copyright restrictions image - Picryl description
U.S. Observatory. Washington DC stereoscope card, 19th cenrury.
Washington DC stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker wh... More
The astronomical observatory, Cambridge, Mass. Cambridge Massachusetts...
Massachusetts stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker wh... More
Science and mathematics: observatory of Oranienberg; observatory of De...
Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description
Stage at Lick Observatory, Mt. Hamilton, Calif.
Picryl description: Public domain photo of vintage California postcard, free to use, no copyright restrictions image.
National Observatory (North Front). Washington DC stereoscope card, 19...
Picryl description: Public domain image of a park, park architecture, outdoors, romantic atmospheric landscape, cemetery, free to use, no copyright restrictions.
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.
Vassar College Observatory, Poughkeepsie, N.Y. New York Sterecope Card...
New York stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
California Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who a... More
The astronomical observatory, Cambridge, Mass. Cambridge Massachusetts...
Massachusetts stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker wh... More
U.S. Observatory. Washington DC stereoscope card, 19th cenrury.
Washington DC stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker wh... More
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
California Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who a... More
Vassar College Observatory, Poughkeepsie, N.Y. New York Sterecope Card...
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
Optical instruments and observatories: ancient astrolabes; pantograph ...
Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description
Lick Observatory, Mount Hamilton, California. Sterescope Cards NYPL Co...
California Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who a... More
Vassar College Observatory, Poughkeepsie, N.Y. New York Sterecope Card...
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description
The astronomical observatory, Cambridge, Mass. Cambridge Massachusetts...
Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description