Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 10
tting them to mem-ory, but is at the same time becoming proficientin the handling of the various drawing tools. THE AUTHOR. PRACTICAL MECHANICAL DRAWING DRAFTING TOOLS Compasses. These, as well as all other instru-ments, should be chosen with great care on ac-count of their variety in shape and… … Fig. 1—Compass poor a quality that it neither holds its shape norwears well. It is better therefore when buying,to select instruments of high grade, and which aremade of the best German silver and a good qual-ity of steel, as the joints are always carefully fit-ted and they will withstand the…
Mechanical drawing · Machine design
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