A text book of geometrical drawing: for the use of mechanics and schools, in which the definitions and rules of geometry are familiarly explained ... with illustrations for drawing plans, sections and elevations of buildings and machinery: an introduction to isometrical drawing, and an essay on linear perspective and shadows. The whole illustrated with fifty-six steel plates, containing over two hundred diagrams
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angle of 45 applied arch axis bisect blue called centre for describing chords circle circumference complementary color cone corner cube curve Cycloid cylinder CYMA describe the arc diagram diameter dividers dotted lines draw a diagonal draw a line draw lines draw rays edge elevation ellipsis erect perpendiculars extrados feet FIGURE fillet front frustrum height hexagon horizontal line hues India ink Isometrical length Let Jl line Jl lines drawn lines parallel middle visual ray NOTE.—The number of equal object ovolo parabola parallel ruler parallelogram perspective plane PLATE point of distance point of sight points of division points of intersection polygon primary colors PROBLEM projection proportions pyramid radius equal rays of light regular polyhedrons right angles right line scale semicircle shade shadow shew shewn sides spectator square square pyramid surface tangent Tetragon tint trapezium triangle vanishing point vertical voussoirs yellow