Before proceeding further, some kind of a permanent holder should be
provided to keep all together the various pieces of the model. This
prevents the confusion and loss of time incident to passing several
kinds of materials each by itself.
[Illustration: PLATE VI. Pattern for a simple envelope.]
One lesson might be used for the making of a portfolio for this
purpose, cut from screenings or heavy wrapping paper, and patterned
after an envelope, from 6” × 9” to 9” × 12” in size. (See Plate VI.)
The contents are more securely held by providing some kind of a
fastener. The following method is a good one: In the center of one side
of the flap plan to punch a hole. This should first be re-enforced by
cutting from heavy paper a circle of ³⁄₁₆ to ⅜ radius and pasting it in
the correct place. Through both thicknesses punch the hole. Into this
insert twine, first looping it in the centre and then passing both ends
through the loop. Use this to tie the envelope.
If large pads of paper are used in the schoolroom, their cardboard
backs may be utilized. Take two of the same size, punch holes along
three sides of each, near the edges and lace them together. If one of
the long sides of the resulting holder has been left open, materials
can be removed with greater ease than if a short side is so used. A set
of holders thus made is very durable.
New paper bags make good holders although less desirable than either of
the other two.