 | James Ferguson - Astronomy - 1776 - 546 pages
...between the lines ac and bd, and fee upright between them, touching at a and b^ its hypothenufc ag wi 1 be parallel to the axis of the world, when the dial is truly fet; and will cafta fhadow on the hour of the day. NB The trouble of dividing the two quadrants may... | |
 | James Ferguson, David Brewster - Astronomy - 1806 - 532 pages
...gi, upon the meridian line ai, and there will be a triangle made, whose sides are ag, gi, and i a. if a plate, similar to this triangle, be made as thick...bd, and set upright between them, touching at a and bt its hypothenuse ag will be parallel to the axis of the world, when the dial is truly set ; and will... | |
 | Encyclopaedia Perthensis - 1807 - 782 pages
...diftance between the lines ac and td, and fet upright between them, touching at a and b, its hypothenufe ag will be parallel to the axis of the world, when the dial is truly fet ; and will caft a fhadow on the hour of the day. The trouble of dividing the two quadrants may... | |
 | Edward Augustus Kendall - Encyclopedias and dictionaries - 1811 - 962 pages
...gi, upon the meridian line ai, and there will be a triangle made, whose sides are a £, gi, and t «. If a plate similar to this triangle be made as thick...set, and will cast a shadow on the hour of the day. The trouble of dividing the two quadrants may be saved, by menus of a scale with a line of chords upon... | |
 | Edward Augustus Kendall - Encyclopedias and dictionaries - 1811 - 482 pages
...gi, upon the meridian line ai, and there will be a triangle made, whose sides are ag, gi, and i a. If a plate similar to this triangle be made as thick...and bd, and set upright between them, touching at o and b; its hypothenuse ag will be parallel to the axis of the world, when the dial is truly set,... | |
 | Edward Augustus Kendall - 1811 - 474 pages
...the meridian line ai, and there will be a triangle made, whose sides are ag, gi, and i a. If a plute similar to this triangle be made as thick as the distance between the lines ac and l, d, and set upright between them, touching at a and b; its hypothcuuse ag will be parallel to the... | |
 | George Adams - Astronomy - 1812 - 552 pages
...pendicular gi upon the meridian line ai, and there will be a triangle made, whose sides are ag, gi, and ta ; if a plate similar to this triangle be made as thick as the distance between the lines ac and Id, and be set upright between them, touching at a and b, the line ag will, when it is truly set, be... | |
 | George Adams - Geometry - 1813 - 648 pages
...similar to this triangle, of the thickness of the interval of the parallel lines aebd which must be made and set upright between them- touching at a and b: its hypothenuse or axis ng will be parallel to the axis of the earth when the dial is fixed truly, and cf course cast... | |
 | James Ferguson - Eclipses - 1823 - 406 pages
...gi, upon the meridian line ai, and there will be a triangle made, whose sides are ag, gi, and i a. If a plate, similar to this triangle, be made as thick...between them, touching at a and b, its hypothenuse a g' wUl be parallel to the axis of the world, when the dial is truly set ; and will cast a shadow on the... | |
 | Encyclopedias and dictionaries - 1823 - 896 pages
...upon the meridian line а г, and there will be a triangle made, whose sides are ag, gi, and ¡a. It' a plate similar to this triangle be made as thick as the distance between the lines ac and !•<!, and set upright between them, touching at a and l>, its hypothenuse ag will be parallel to... | |
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If a plate similar to this triangle be made as thick as the distance between the lines ac and bd, and set upright between them, touching at a and b, its hypothenuse ag... 
