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" There are substantial supports outside the rotunda, from one or the other of which all portions of the heavens may be seen, and a level platform covers the roof of the building for the greater convenience of the observer with the comet_seeker. "
Astronomical, Magnetic and Meteorological Observations Made at the United ... - Page viii
by United States Naval Observatory - 1867
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astronomical and meteorological observations made at the united states ...

JOHN R. EASTMAN, B. F. Sands, the hin.secretary of the navy, Coffin, Page, Steedman, Commander J.M. Gilliss, M.F. Maury, M.Narnall, James Major, T.J. Robinson, SIMON NEWCOMB, United States Naval Observatory, William Harkness, james major, u.s.n., lafayette maynard, u.s.n, william b. muse, u.s.n, john rodgers, u.s.n - 1872
...covers the roof of the building for the greater convenience of the observer with the comet_seeker. For the purpose of giving correct time to the city,...the dome, and a large, but light, ball is hoisted ten minutes before 12 o'clock of each day, except Sunday. The pulley is connected with an electro_magnetic...
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astronomical and meteorological observations made at the united states ...

JOHN R. EASTMAN, B. F. Sands, the hin.secretary of the navy, Coffin, Page, Steedman, Commander J.M. Gilliss, M.F. Maury, M.Narnall, James Major, T.J. Robinson, SIMON NEWCOMB, United States Naval Observatory, William Harkness, james major, u.s.n., lafayette maynard, u.s.n, william b. muse, u.s.n, john rodgers, u.s.n - 1872
...of the main building, and there are substantial supports for the instrument outside of the rotunda, from one or the other of which all parts of the heavens...is hoisted thereon at ten minutes before mean noon every day, except Sundays and the national holidays. After the ball is up, the pulley is connected...
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The National Almanac and Annual Record

1864 - 670 pages
...greater convenience of the observer with the cometseeker. " For the purpose of giving correct time to tho city, a staff has been placed on top of the dome, and a large but light ball is hoisted ten miiyites before twelve o'clock of each day except Sunday. The pulley is connected with an electro-magnetic...
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The National Almanac and Annual Record for ...

William Vincent McKean - 1864 - 668 pages
...сотегя the roof of the building for the greater convenience of tho observer with tho cometseeker. " For the purpose of giving correct time to the city, a staff has been placed on top of tho dome, and a largo but light ball is hoisted ten in inn tee before twelve o'clock of each day t-xcept...
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The National Almanac and Annual Record for ...

William Vincent McKean - 1864 - 668 pages
...of the observer with the comet•eeker. "For the purpose of giving correct time to the dty, a RtAfF has been placed on top of the dome, and a large but light ball is hoisted ten minutes before twelve o'clock of each day except Sunday. Tlie pulley Is connected with an electro-magnetic...
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Sky and Ocean Joined: The US Naval Observatory 1830-2000

Steven J. Dick - 2003 - 636 pages
...perhaps even earlier. As Gilliss wrote "For the purpose of giving correct time to the city, a staffhas been placed on top of the dome, and a large, but light, ball is hoisted ten minutes before 12 o'clock of each Whatever the material or the method, the result was the same:...
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