Publisher's Synopsis
Excerpt from d104 Book of Mechanical Drawing: Being an Explanation of the Principles of Geometry and Orthographic Projection, the Helix, and Toothed Gearing as They Are Applied by Mechanical Draughtsmen, With Rules for Screw Cutting
The projections from all points of an object perpendicular to these planes of projection are called orthographic projections. The projection on hh is called the top or plan, on a the front elevation, and on c the side elevation. It can readily be seen without any reference to the planes that these views are arranged as common sense would suggest, bringing the-top to the top, the front 'to the front, and the side to the side.
In the illustrations the small letters h and v are used with all other letters to indicate in one case the horizontal and in the other the vertical planes.
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