Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 414
phere along ah till it rests on the H.P.,its required position. When the sphere is resting on the H.P. TANGENT PLANES AND SOLIDS 393 we know that the height of its centre above the H.P. is equal toits radius, so draw a horizontal line c at this height above XY. Let us imagine the line (/E to… … Fig. 190. To complete the plan we shall require a supplementaryelevation of the sphere. Take a section through the cone, at right angles to its axis,on the line ah. Produce the axis, and at any point 0 as centre, and radiusequal to ol, draw a circle. Draw OE perpendicular to the axisproduced. Draw…
Geometrical drawing
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