A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1853)
Mattison, Hiram, 1811-1868 · New York, F. J. Huntingdon [etc.] · leaf 21
placed horizontally,and the other perpendicular to it. They aretherefore perpendicular to each other, howeverthey may stand in relation to the observer. Inclined Planes are such asare inclined toward, and cuteach other obliquely. The Angle of Inclination isthe angle contained between thetwo… … CONVEX AND CONCAVE SURFACES.
Astronomy
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