to many pieces, take a clean glass, the
same size as the broken negative, and put upon this the pieces,
joining them accurately, says Camera Craft. Put another clean
glass on top of this and bind the three together with
passe-partout binding or gummed strips of ordinary paper, as one
would a lantern slide, and cover the glass edges.

Next make a transparency of this--in the camera, of course--and if
it is done right, the positive will only show the cracks as dark
and light lines. The

[Illustration: Before and After Mending]

dark lines are removed with the etching knife and the light ones
with the retouching pencil. From this transparency another
negative can be made, or as many negatives as necessary, by either
contact or in the camera, and if the work on the glass positive
was done carefully, no trace of the break should be seen on the
finished negative. If the negative is broken in two or three
larger pieces only, a contact positive may be made in the printing
frame without binding, by using a clean glass in the latter, upon
which the pieces are put together, face up, and a dry plate
exposed in contact with them in the dark room. The accompanying
engravings show a print before and after repairing a broken
negative in this manner.

** Coin and Tumbler Trick [378]

The accompanying sketch shows how a good trick may be easily
performed by anyone. Lay a piece of

[Illustration: This Is a Good Trick]

heavy paper that is free from creases on a board or table. Secure
three tumblers that are alike and stick a piece of the same heavy
paper over the openings in two of them, neatly trimming it all
around the edges so as to leave nothing of the paper for anyone to
see. Make three covers of paper as shown in Fig. 1 to put over the
tumblers. Place three coins on the sheet of paper, then the
tumblers with covers on top of the coins, the unprepared tumbler
being in the middle. Now lift the covers off the end tumblers, and
you will see that the paper on the openings covers the coins.
Replace the covers, lift the middle one, and a coin will be seen
under the tumbler, as the opening of this tumbler is not covered.
Drop the cover back again and lift the other tumblers and covers
bodily, so that the spectators can see the coins, remarking at the
same time that you can make them vanish from one to the other. The
openings of the tumblers must never be exposed so that any one can
see them, and a safe way to do this is to ke