These sketches were also suggested for problems in arithmetic. The
problems relate to lumbering, measurement, and commission.
No. 1 illustrates the beginning of a forest sketch. With a single
stroke of the chalk, accented at the lower end, draw the sky. With a
second more delicate stroke show the distance; then with a few quick,
nearly vertical strokes with the eraser show the positions of the
trees. Later with chalk or charcoal and the use of such strokes as
those given on plate 2, and at No. 3 on this plate, add the shading in
the tree trunks.
No. 2 shows the strokes useful in drawing the camp, the wood pile, or
the lumber. These have already been given in such sketches as those on
plate 15.
The sketch of the house in the original had the dimensions marked upon
it, and the pupils were to find the shingles required for the roof, the
clapboards for the walls, etc.
Before trying this sketch, study plates 15 and 16 for strokes and
details.
[Illustration: Plate 29]