Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 104
Fig. 250.—Development of a helix. Fig. 251.—Projections of a helix. Fig. 252.—Plotting paper for polar co-ordinates. curve, and its axis is in a horizontal position, whilst the latter is the elevation of a line winding round the cylinder, and its axisis in a vertical position. The plans of the…
Mechanical drawing · Geometrical drawing
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