Teachers' manual for the Prang course in drawing for graded schools, books 1-6 (1897)
Clark, John Spencer, Prang Company, Hicks Mary D, Perry, Walter Scott · Boston. Prang educ. co. · leaf 154
e angles at which branches leave the main stem, the angles at whichthe principal leaves are set upon their stalks, and the general directions of the leaf-outlines should all be thus blocked in with light, straight, or nearly straight, lines. Thispreliminary blocking-in is for the sake of getting…
Drawing -- Study and teaching
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