Smith, Hamilton Lanphere, 1819-1903. [from old catalog] · Cleveland, M. C. Younglove and company · leaf 24
a common centre, and two lines drawn from that centre, including20 degrees of each circle. All circles are supposed therefore, to be divided into 360 parts,and the 1-360 part of any circle is called a degree. Two kinds of circles are supposed to be traced on the earth, as also in theheavens, viz,… … Let ABCD, &c, represent the earth, and letG C be a circle 22 THE WORLD. the plane of which passes directly through the centre of the earth;this is a great circle. So is A E for the same reason, for if theglobe were to be divided through these circles it would be exactlyhalved, but a circle…
Astronomy · Meteorology · Geology · Paleontology
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-64-40.webp)
![An illustration from A treatise describing and explaining the construction and use of new celestial and terrestial globes; designed to illustrate ... the phoenomena [sic] 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 (1766)](https://img.insideoutlibrary.com/img/200/ia-treatisedescribi00adam-116-8.webp)
