Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 32
Fig. 44 Fig. 45 … 22 PRINCIPLES OF DESCRIPTIVE GEOMETRY the given plane. (Art. 18.) The point in which this per-pendicular pierces the given plane is then determined.(Art. 28.) To find, therefore, the length of the perpendicular, aprojecting plane containing the perpendicular line is revolvedabout its trace into the…
Shades and shadows · Geometry, Descriptive
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
