Graphics : a manual of drawing and writing, for the use of schools and families (1838)
Peale, Rembrandt, 1778-1860, author · Philadelphia : J. Whetham · leaf 102
96 MANUAL OF DRAWING. SHADING. … Daring the frequent attempts which the young Student by this time has made in drawing from artificial and natural objects, he must have remarked the various effects of shadows, by means of which protuberance, flatness, and concavity, are characterized. An even shade is produced by lines more or…
Drawing -- Study and teaching · Penmanship -- Study and teaching
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.