Graphics : a manual of drawing and writing, for the use of schools and families (1838)
Peale, Rembrandt, 1778-1860, author · Philadelphia : J. Whetham · leaf 40
34 MANUAL OF DRAWING. PROPORTIONS OF CURVES. … Curves, whether simple or compounded of more parts than one, may be further considered as they are found to be portions of circles or ovals ; and they may be imi¬ tated by producing equal or similar swells upon a line, as a , supposed to run through them ; taking care to imagine the supposed line…
Drawing -- Study and teaching · Penmanship -- Study and teaching
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Introductio geographica Petri Apiani in doctissimas Verneri annotationes, co[n]tinens plenum intellectum [et] iudicium omnis operationis, quæ per sinus [et] chordas in géographia confici potest, adiuncto radio astronomico cum quadrante nouo meteoroscopii loco longe vitilissimo. : Huic accedit translatio noua primi libri Géographiæ Cl. Ptolemæi . (1533)](https://img.insideoutlibrary.com/img/200/ia-introductiogeogr00apia-62-0.webp)
