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4 résultats pour : early 1900s naval observatory

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Administration building, Naval Observatory ca. between 1909 and 1919
UMG22A12_291

Administration building, Naval Observatory ca. bet...

Charles C. Wylie setting back clock at Naval Observatory ca. between 1918 and 1928
UMG22A13_112

Charles C. Wylie setting back clock at Naval Obser...

Chester Burleigh Watts turning back the hands of a clock at the Naval Observatory in 1918 (possibly in honor of the first Daylight Savings Time) .
UMG21A21_165

Chester Burleigh Watts turning back the hands of a...

Chester Burleigh Watts turning back the hands of a clock at the Naval Observatory in 1918 (possibly in honor of the first Daylight Savings Time) .
UMG21A21_166

Chester Burleigh Watts turning back the hands of a...