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 217
^^^v::: ■ ,...,-.,. ■■■■ . \v^~lllll.»-..I … lines or construction lines as helps in getting the masonry firm and true in posi-tion. In such a case it would be especially helpful to draw diagonals across the
Drawing -- Study and teaching
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