A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 287
at / on the pro-jector drawn from /% at the proper distance above the baseline. This will be one end of the line in the elevation 28 PRACTICAL PROJECTION §15 With the compasses set to 2 inches (the length of A B) andusing the point y, fixed on the projector drawn from i% as acenter, describe an arc… … Fig. 9 triangle that the line y Ais at an angle of G0° with the baseline. It will be seen that it would have been possible, afterfixing the position of a point at either end. to have drawnthe line at once with the 60° triangle. Attention is calledto both methods in order to show the student the…
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