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" ... three inches square, be nailed to the lower edge of it, for the purpose of holding a candle. About twenty-five minutes before the time of the greatest eastern or western elongation of the pole-star, as shown by the tables of elongations, let the theodolite... "
Elements of Surveying: With the Necessary Tables - Page 100
by Charles Davies - 1830 - 300 pages
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Elements of Surveying, and Navigation: With Descriptions of the Instruments ...

Charles Davies - Navigation - 1854 - 322 pages
...about three inches square, be nailed to the lower edge of it, for the purpose of holding a candle. About twenty-five minutes before the time of the greatest...board be slipped up or down, until the pole-star can beseen through the hole. The light reflected from the paper will show the cross hairs in the telescope...
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Manual of United States Surveying: System of Rectangular Surveying Employed ...

J. H. Hawes - Electronic book - 1868 - 210 pages
...shown by the tables of elongations, let the theodolite be placed at a convenient point and leveled. Let the board be placed about one foot in front of....the board be slipped up or down, until the pole-star caii be seen through the hole. The light reflected from the paper will show the cross hairs in the...
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Elements of Surveying and Leveling; with Descriptions of the Instruments ...

Charles Davies - 1871 - 270 pages
...about three inches square, be nailed to the lower edge of it, for the purpose of holding a caudle. About twenty-five minutes before the time of the greatest...The light, reflected from the paper, will show the cross-hairs in the telescope of the theodolite. Then, let the vertical spider's line be brought exactly...
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Instructions of the Commissioner of the General Land Office to the Surveyors ...

United States. General Land Office - Public lands - 1881 - 113 pages
...shown by the tables of elongations, let the theodolite be placed at a convenient point and leveled. Let the board be placed about one foot in front of...light reflected from the paper will show the cross hairę in the telescope of the theodolite. Then, let the vertical spider's line be brought exactly...
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Elements of Surveying and Leveling

Charles Davies - Surveying - 1883 - 564 pages
...at a convenient point and leveled. Let the board be placed about one foot in front of the transit, a lamp or candle placed on the shelf at its lower...hole. The light reflected from the paper will show the cross-wires in the telescope of the transit. Then let the vertical cross-wire be brought exactly upon...
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Elements of Surveying and Leveling

Charles Davies - Surveying - 1883 - 564 pages
...the table of elongations (see Art. 164), let the transit be placed at a convenient point and leveled. Let the board be placed about one foot in front of the transit, a lamp or candle placed on the shelf at its lower edge, and let the board be slipped tip or...
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Manual of Instructions for the Survey of the Public Lands of the United States

United States. Bureau of Land Management - Surveying - 1890
...as shown by the tables of elongations, let the transit be placed at a convenient point and leveled. Let the board be placed about one foot in front of the instrument, a lamp or candle placed on the shelf at its lower edge ; and let the board- be slipped...
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