Excerpt from Elements of Mechanical Drawing: For Use in the Schoolroom and the Workshop
As almost all forms in machinery 'are geometrical, and as it is necessary for the pupil to have a knowledge of the names of the different geometrical forms, and also to know how to construct the same, the following definitions must be learned by the class. The pupil should draw on paper and on the blackboard all exercises illustrating these definitions.
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Elements of Mechanical Drawing: For Use in the Schoolroom and the Workshop (Classic Reprint) pdf
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