Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 99
at the same time the difficulties of construction. Thesemethods, also called false perspective, are described under the heading of isometric projection, andwill be further explained in the following chapter under the title Cabinet Projection. 113 114 ROGERS DRAWING AND DESIGN. ISOMETRIC PROJECTION.… … Fig. a». They may be drawn by the 30° and 60° triangles ;the lines ac and ab forming angles of 30° with ahorizontal line ; ag is a vertical line. All the lines in this figure are parallel to theseaxes, viz.: all the lengths are parallel to ab and allthe widths are parallel to ac.
Mechanical drawing · Machine design
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