The technic of mechanical drafting a practical guide to neat, correct, and legible drawing (1904)
Reinhardt, Chas. William (Charles William), b. 1858 · New York, The Engineering News Pub. Co. · leaf 30
uld change as abruptly as possible between the different sets. In showing stratified Keys--. ^ 5fee/: Wedge . ° rock, horizontal seams,or nearly so, should bepredominant, except ina case where a dip ofthe strata occurs, whennaturally the seamsmust be drawn so as torepresent that inclina-tion. If… … Transverse Section. Fig. 52. not definitely known, and is executed, as shown on plate III., bywavy, freehand lines. In showing puddle section on same plate the horizontal strokesmay be done either freehand or by rule; they should however, breakjoint neatly ; the same may be said of the symbol for…
Mechanical drawing
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