The strokes given in this lesson, although not used as frequently as
those previously given, are nevertheless valuable.
No. 1 shows the manner in which the stroke is produced. Place a piece
of chalk in the position indicated by the line below the stroke,
then swing the chalk rapidly back and forth, shortening the stroke
and gradually twisting the chalk to the vertical position. No. 2 is
produced in the same manner. Place the chalk obliquely as indicated,
and keep the movement oblique, shortening the stroke, and twisting the
chalk gradually to the horizontal position.
The fern is drawn by first sketching a few main lines, No. 3, and then
upon these apply the strokes given as shown at No. 4. Hardly touch the
board at first, keeping the tones very gray; then add a few white ferns
as in the sketch.
No. 6 illustrates the same stroke used in a much bolder fashion and in
a generally horizontal direction. After applying this stroke, accent
here and there with a much shorter stroke, and add the trunk and
branches.
Study the trees given on plate 12 in connection with this illustration
and notice the variety of strokes given for the different trees.
[Illustration: Plate 7]