Graphics : a manual of drawing and writing, for the use of schools and families (1838)
Peale, Rembrandt, 1778-1860, author · Philadelphia : J. Whetham · leaf 42
& MANUAL OF DRAWING. CURVES DEFINED BY ANGLES. … All curves may be considered as essentially composed of short angular lines, the direction and length of which determine the shape of the object, as in fig. 1, which is an example of a curve composed of segments of straight lines. The dotted lines are extended only to show more, distinctly their…
Drawing -- Study and teaching · Penmanship -- Study and teaching
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
