Emerson, William, 1701-1782 · London : Printed for J. Nourse · leaf 225
rcles are perpendicular toojeftion ; the angle made by theirh this plane, is the fame as the angleircles. j^ £. £». PROP. in. ? parallel to the plane of preje^ion isrc/e, whofe center is the pole of pro-us the tangent of the circles dijlance^rojeStion. e PI be parallel to the plane GF,ches PC, CI… … ^l/P-;i4. o Sea. Iir. OF THE SPFIERE. 35^ a circle equal to a great circle of the fphere •, and may Fig^therefore be looked upon as the primitive circle in thisprojection, and its radius the radius of projeClion, PROP. IV. Every leffer circle {not parallel to the plane of pro- 4.0.jetlion) is…
Mechanical engineering
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
