A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 186
sphere, the arches F N, II L, are equal. Andsince the great circle BNLD is projected intothe straight line bQnl, &c., therefore n is theprojection of N, and / that of L: hence/n, h I,the projections of F N, H L, respectively, areequal. Prop. VII. Theor. VII. If Fre/c, hlg, fig.2, be the… … London rtibhshed b^vIhotnasleaa 73Chettpside FebruaryJ.Idi9. J.Shnrysculp. PROJECTION OF THE SPHERE. 173 vided in o, so that the degrees in C o, op, beequal, and the perpendicular o S be erected tothe line of measures g h. Then the line pn, C /,drawn from the poles C, p, through any point Qin the…
Encyclopedias and dictionaries · Aeronautics
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