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Books Books 1 - 5 of 5 on ... make the contact of the limbs of these objects as perfect as possible at the....  
" ... make the contact of the limbs of these objects as perfect as possible at the wire nearest the plane of the instrument ; fix the index in this position; move the sextant till the objects are at the other wire, and if the same limbs are in contact the... "
The improved coaster's guide, and Marine board examination, for the east ... - Page 163
by Alexander Baharie - 1844
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The theory and practice of finding the longitude at sea or land ..., Volume 1

Andrew Mackay - Latitude - 1809 - 8 pages
...stars of the first magnitude, or the Sun and Moon, whose distance may not be less than 90 or 100; make the contact of the limbs of these objects as...either apparently separated, or partly cover each oiher, correct half the error by the screws in the circular part of the supporter, one of which is...
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An epitome of navigation, and nautical astronomy, with the improved lunar tables

Janet Taylor - Transportation - 1842
...distanee (in order that the error may be the more obvious,) should not be less than from 100 to 120 ; make the contact of the limbs of these objects as perfect as possible at the wire which is nearest the plane of the sextant, and fix the index, move the instrument a little so as to...
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A treatise on land surveying [ed.] by W. Galbraith

John Ainslie - History - 1849
...whose distance is not less than 90 or 100 ; move the index till the coincidence of these objects is as perfect as possible at the wire nearest the plane of the instrument ; move the instrument till the objects are at the other wire ; and if the objects are still iu contact,...
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An epitome of navigation and nautical astronomy, with improved lunar tables ...

Mrs. Janet Taylor - Transportation - 1851
...distance (in order that the error may be the more obvious,) should not be less than from 100 to 120; make the contact of the limbs of these objects as perfect as possible at the wire which is nearest the plane of the sextant, and fix the index, move the instrument a little so as to...
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The yachtsman's handybook for sea use

James Rosser - 1877
...in contact, the axis of the telescope is parallel with the plane of the instrument. If the objects are either apparently separated, or partly cover each...other, correct half the error by the screws in the double collar ; then bring the objects again to the wire next the instrument, and. if they' are in...
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