Mechanical drawing: lettering, materials and methods (1916)
Kepler, Frank R. (from old catalog) · Detroit, Mich., Pub. under authority of the Board of education · leaf 19
gainst the left-hand edge of the board so that the bladeextends across the board. Horizontal fines are drawn, using the 16 MECHANICAL DRAWING upper edge of the T-square as a guide. Fig. 3. The upper edgeof the T-square is also used for placing the triangles against todraw vertical lines and lines… … Figure 4 An angle is formed by the meeting of two lines. Angles aremeasured by degrees. 11 we consider that the line oa, Pig. 7, hasbeen revolved about the point o as a center until it has made onecomplete revolution, we say that it has revolved through 360 de-grees, a degree being one-three…
Lettering · Mechanical drawing
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