The length of the slot is of great importance. It must
reach to just that distance from the top edge which brings that edge flush
with the bottom of the box when the box is raised; and in the other
direction must permit the box to settle on to its foot, so that the match
lifted shall project above the box.
Work the edges of A down carefully (double-bevelling them if the notches
are V-shaped) till A will run easily, but not loosely, in the box. Then
cut out two slips, DD, and bevel them at the top to an angle of 45 degrees.
Put A in place and glue them on, taking care that the glue does not hold
them fast to A.
Pierce a small hole through DD, in line with the slot, and insert a pin.
Draw the box fully up, and see if the top of A sinks to the proper place.
If it projects a little, lengthen the slot a trifle.
Cut out the supports EE, finish them neatly, and glue them to A. Make sure
that the pin lets the box touch them.
Fix on the lid B with two pins for pivots, and fit a little catch made of
brass wire. To give extra security, drive ordinary pins, cut off to 5/8
inch, through the sides into fixed B, CC, and DD, and through EE into A.
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