Appletons' cyclopædia of technical drawing : embracing the principles of construction as applied to practical design ... (1896)
Worthen, W. E. (William Ezra), 1819-1897 · New York : D. Appleton · leaf 596
FIG. 1409. FIG. 1-110. horizontal lines through these points; or the same points maybe determined byintersection of the projections of the plan with a single inclined line drawnalong the^ nosing of top and bottom steps. The number of treads is always oneless than the number of risers, the reason of…
Mechanical drawing
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