 | Robert Woodhouse - 1821 - 1068 pages
...of observing either equal pairs of azimuths or equal pairs of altitudes. t Instrument drs Passages. grooves fastened in two stone pillars E and W, so...the graduated face of a circle, attached, as it is shewn in the figure, to the eastern pillar. The use of this part of the apparatus is to adjust the... | |
 | Robert Woodhouse - 1821 - 490 pages
...declination, during the intervals of observing either equal pairs of azimuths or equal pairs of altitudes. grooves fastened in two stone pillars E and W, so...the graduated face of a circle, attached, as it is shewn in the figure, to the eastern pillar. The use of this part of the apparatus is to adjust the... | |
 | Robert Woodhouse - 1821 - 922 pages
...the western. On the eastern end of the axis is fixed (so that it revolves with the axis) an index «, the upper part of which, when the telescope revolves,...the graduated face of a circle, attached, as it is shewn in the figure, to the eastern pillar. The use of this part of the apparatus is to adjust the... | |
 | Thomas Curtis - 1829 - 852 pages
...soon explained, for two adjustments of the telescope. 818. Let E be called the eastern pillât, \Vthe western. On the eastern end of the axis is fixed (so...of the apparatus is to adjust the telescope to the zenith, or polar distance (for the one is as easily done as the other) of a star, the transit of which... | |
 | Thomas Curtis (of Grove house sch, Islington) - 1839 - 906 pages
...818. Let F, be called the eastern pillai, \V the western. On the eastern end of the axis is fixed (s» that it revolves with the axis) an index n, the upper part of which, when the telescope i, ne.irly slides along the graduated face jrrectcd, by making ihe line of sight folUv the circular... | |
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One of the grooves is horizontal, the other vertical, so that, by means of screws, one end of the axis may be pushed a little forwards or backwards, and the other end may be either slightly depressed or elevated. Which two small* movements are necessary,... 