9 Free Images of United States Naval Observatory

telescopes containing lenses ground by alvan clark & sonsalvan clark1873 works in the united states
John Q. Adams
photographs of john quincy adamswet collodion
USNO Refractor 1904, Alvan Clark, circa 1904
united states naval observatory1873 works in the united states
US Navy 030826-N-9593R-043 Personnel at the U.S. Naval Observatory in Washington, D.C., prepare the facility's historic 26-inch refractor telescope for optical viewing of Mars, Alvan Clark
united states naval observatory1873 works in the united states
Cheney's dogs dressed for halloween
halloween costumes in the united statesdogs wearing halloween costumes
Usno-telescope-equalized-1, Alvan Clark
united states naval observatory1873 works in the united states
Naval Observatory Astronomer Using 12-inch Alvan Clark Telescope, 1892, Alvan Clark
telescopes containing lenses ground by alvan clark & sonsunited states naval observatory
Santa Lucia - J. Queen ; P.S. Duval & Cos. Steam lith. Press, Phila. LCCN2014649314, James Fuller Queen, 1855
james fuller queenp.s. duval & son
USNO26in-2, Alvan Clark
united states naval observatory1873 works in the united states
Herter Founders of the National Academy of Sciences 1924, Albert Herter
albert herteraestheticism
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