A Treatise Describing and Explaining the Construction and Use of New Celestial and Terrestial Globes: Designed to Illustrate, in the Most Easy and Natural Manner, the Phoenomena of the Earth and Heavens, and to Shew the Correspondence of the Two Spheres : with a Great Variety of Astronomical and Geographical Problems Occasionally Interspersed |
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A Treatise Describing and Explaining the Construction and Use of New ... George Adams No preview available - 2018 |
A Treatise Describing and Explaining the Construction and Use of New ... George Adams No preview available - 2017 |
Common terms and phrases
afcenfion alſo anſwer antarctic circle artificial fun aſtronomers autumnal equinox azimuth becauſe biſſextile broad paper circle broad-paper circle celestial globe compaſs correſpondent deſcribed diſk diſtance Ditto diurnal motion dominical letters duated earth eaſt eastern fide ecliptic equator fame firſt point folar fouth fouthern fun's place furface graduated edge graduated fide horary index horizon hour increaſe inhabitants inſtant Inſtruments interfection itſelf juſt laſt latitude longitude minutes paſt month moon moſt elevated muſt noon obſerve oppoſite paffing parallel paſs paſſage paſſes plane point of aries point of libra polar-circles poſition Rectify the globe repreſented reſpect rifing right aſcenſion riſes ſame ſecond ſeen ſet ſeveral ſhade ſhadow ſhall ſhew ſide ſituation ſpace ſphere ſtar marked ſtrong braſs meridian ſubſtract ſuch ſun ſun's ſuppoſed terrestrial globe theſe thoſe places thoſe ſtars tropic tropic of cancer turn the globe uſe vernal equinox vertical viſible weſt whoſe zenith
Popular passages
Page 90 - PROBLEM vi. To find the Distance of any two Places on the Globe. Lay the graduated edge of the quadrant of altitude over both places, and the degrees between them, multiplied"by 69J, will give the distance in English miles.
Page 22 - ... the colures are two great circles, intersecting each other at right angles in the poles of the world, and encompassing the earth from north to south, and from south to north again...
Page 21 - Fig. 33. ecliptic and to the equator, for it passes through the pole of each of these circles. 98. Tropics and Polar Circles. — The tropics are two small circles parallel to the equator, and passing through the solstices. That which is on the north side of the equator is called the Tropic of Cancer, and the other the Tropic of Capricorn. The polar circles are two small circles parallel to the equator, and distant 23° 27
Page 85 - If the latitude be north, bring the beginning of Cancer to the brafen meridian, and elevate the north pole to about 66|- degrees; but if the latitude be fouth, bring the beginning of Capricorn to the meridian, and elevate the fouth pole to about 66| degrees ; becaufe the longeft day in north latitude, is when the fun is in the firft point of Cancer ; and in fouth latitude, when he is in the firft point of Capricorn. Then fet the hour-index to XII at noon, and turn the globe weftward, until the index...
Page 97 - ... fet the :north pole of the globe towards the north pole of the heavens. The ftar upon the globe (if you conceive yourfelf in the center) which directs towards that point in the heavens, in which the ftar you want to know is feen, is the ftar required. At the fame time, by comparing the ftars in the heavens with thofe upon the globe, the other ftars and their conftellations may be eafily known ; whereby you will be enabled any ftar-light night, to point out I 4 many many of thofe ftars called...
Page viii - ... discoveries ; there are also many additional circles, as well as the rhumb-lines, for solving all the necessary geographical and nautical problems. On the celestial globes, all the southern constellations, observed at the Cape of Good Hope by M. de la Caille, and all the stars in Mr. Flamstead's British Catalogue, are accurately laid down and marked with Greek and Roman letters of reference, in imitation of Bayer. Upon each side of the ecliptic are drawn eight parallel circles, at the distance...
Page 97 - ... which fhews the time of their fetting in the evening that day. It will alfo appear on the: circle of the horizon, that they rife with about 40 degrees of amplitude to the north, and fet with the fame amplitude from the weil.