astronomical and meteorological observations made at the united states naval observatory during the year 1862JOHN 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 |
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Astronomical and Meteorological Observations Made at the United States Naval ... Commander J M Gilliss No preview available - 2016 |
Astronomical and Meteorological Observations Made at the United States Naval ... Commander J. M. Gilliss No preview available - 2013 |
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Page vii - Astronomical Observations made at the Naval Observatory, Washington, under orders of the Hon. Secretary of the Navy, dated August 13, 1838, by Lt.
Page x - Report on the plan and construction of the Depot of Charts and Instruments, with a description of the instruments," &c., made to the Secretary of the Navy in February, 1845, and published as Senate Document No.
Page x - 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.
Page ix - The Transit in the prime vertical is in the north room of the south wing. The telescope has an aperture of 4.85 inches and a focal length of 78 inches. It is attached to one extremity of an axis 42 inches long, the other extremity carrying a counterpoise. The pivots of the axis are of fine steel 3.5 inches in diameter and are hollow. The telescope and its counterpoise are outside of the supporting pier...
Page ix - The instrument has not been in use for several years, and such had been its neglect that it was necessary to dismount and grind out the oxidation of its pivots and make other extensive repairs. These were very successfully performed by Mr. William Würdemann and the machinist of the observatory, and observations in the prime vertical will shortly be resumed.
Page viii - J. Young, of Philadelphia. Its telescope has an object-glass of 4.5 inches clear aperture, with a focal length of 58.2 inches. The axis is 28.0 inches long between the bearing points of steel pivots 2.0 inches in diameter. The material changes from the description of it given in the volume of Observations for 1846 are the substitution of circles...
Page viii - ... are temporarily placed in a second one, and the other two are used for storerooms. All of them, together with the separating halls, are heated by iron pipes, through which hot water circulates from a boiler under the residence of the Superintendent. The Meridian Transit Instrument is in the west wing. It has an...
Page x - The pulley is connected with an electro_magnetic battery after the ball is up, and the circuit is broken by the assistant in the chronometer room at the instant of noon. For a more detailed account of the buildings and instruments, see " Report on the plan and construction of the Depot of Charts and Instruments, with a description of the instruments, &c., Washington, 1845...
Page v - On taking charge of this establishment at the close of April last, I found that the following observations, made prior to the 1st of January, 1861, had not been prepared for the press, though considerable progress had been made in the reduction of the Mural Circle and Equatorial Observations : — Transit Instrument, 1861-1860, both Inclusive.