Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc (1919)
Fairfield, Howard Parker, 1858-, Kenison, Ervin, Waite, Edward B. (Edward Broughton), 1873-, American Technical Society · Chicago, American technical society · leaf 275
196 MECHANICAL DRAWING 131 although rather difficult to make. The block letter, Fig. 195, ismade on the same general plan as the Gothic, but much heavier.Small squares are taken as the unit of measurement, as shown.The use of this letter is not advocated for general work, although
Mechanical drawing · Blueprinting
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