1. Design some simple theme in vertical and horizontal lines and
arrange it in several rectangles of the same size, varying the
spacing in each, No. 29a.
2. Compose a straight‐line theme in several rectangles of different
proportions, No. 29b.
3. Choose the best and trace with brush and ink.
In the first case there is variation of interior lines only; in the second
all lines are changed. This exercise admits of great expansion, according
to age of pupils and limits of time.