The Works of the Rev. Isaac Watts D.d. in Nine Volumes (Volume 8) - Tapa blanda

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Book may have numerous typos, missing text, images, or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1813. Excerpt: ... THE FIRST PRINCIPLES OF GEOGRAPHY AND ASTRONOMY. Section I. Of the Spheres or Globes of the Heaven and Earth. X HERE is nothing gives us a more easy or speedy ad* quaintance with the earth and the visible heavens than the representation of them on a globe or sphere; because hereby we have the most natural image of them set before our eyes. The terrestial globe represents the earth with its several lands, seas, rivers, islands, &c. The celestial sphere or globe represents the heavens and stars. Several points and circles are either marked or described on those spheres or globes, or are represented by the brass and wooden work about them, to exhibit the places and the motions of the sun, moon, or stars, the situation of the several parts of the earth, together with the relation that all these bear to each other. The earthlu globe, with the lines and signs and points that are usually marked upon it, is sufficient to inform the reader of almost every thing that I shall mention here, even with regard to the heavens, the sun and the planets; unless he has a mind to be particularly acquainted with the fixed stars, and the several uses of them ; then indeed a celestial globe is most convenient to be added to it. Note 1st, Half the globe is called a hemisphere; and thus the whole globe or sphere of the heavens, or of the earth, may bo represented on a ilat or plane in two hemispheres, as in the common maps of the earth, or in draughts or descriptions of the heavens and stars.' Because globes are not always at hand, the several points and circles, together with their properlies, shall be so described in this discourse as to lead the reader into some general and imperfect knowledge of these things (as far as it may be done by a map of the world, which is nothing else but a representation of th...