Place before the class a large square plinth (the thickness, say 4 inches, being about one fourth of its other dimensions) first in several positions lying on one of its F-119 square faces, and afterwards standing on one edge in several positions ; or each pupil may construct the plinth from cardboard as in the case of the cube and the square prism. The diagram, Fig. Q, will show how to lay off the proper form.
In drawing the plinth proceed with the --- several parts in the same order as for the cube, as illustrated on a small scale by Figs. 29, 30, 31, 32, 33, 34, 35, and 36. It should be drawn on blank page 5, making the front edges of the drawings about three inches long.
After pupils have drawn the cube and the square plinth, they should be permitted
and encouraged to draw rectangular boxes, large books, and similar objects at home or outside of school. These may be sketched on loose pieces of paper, brought to school, criticised if necessary by the teacher, and then re-drawn on one of the unnumbered blank pages of the drawing-book.