atisfactory results.

[Illustration: Fig 2. Box Corner Makes a Book Holder]

The book-holder shown in the sketch will hold such books securely,
allow the pages to be turned easily and conceal the smallest
possible portion of each page.

The holder can be cut out of a box corner and fitted with two
screw eyes, which have the part shown by the dotted lines at A
(Fig. 1) removed. The length of the back board determines the
slope for the book rest.
--Contributed by James M. Kane, Doylestown, Pa.

** Clamping a Cork [33]

It is aggravating to continually break the cork of the stock
mucilage bottle because of its sticking to the neck of the bottle
after a supply has been poured out. If a stove bolt is inserted
lengthwise through the cork with a washer on each end and the nut
screwed up tightly, as shown in the sketch, the cork may be made
to last longer than the supply of mucilage and can be placed in a
new bottle and used over and over again.

[Illustration: Cork Clamp]

** Withdrawing Paper from under an Inverted Bottle [33]

Invert a bottle on a piece of paper near the edge of a table top
and ask anyone to remove the paper without overturning the bottle.
They will at once jerk the paper with the result that the bottle
will turn over. To remove the paper just strike the table top with
your right fist while pulling the paper slowly with your left
hand. As you strike the table the bottle will jump and release the
paper.
--Contributed by Maurice Baudier, New Orleans, La.

** Emergency Tire Repair [33]

A bone collar button makes a good substitute for a plug in
repairing a puncture in a single-tube bicycle tire.

** Broom Holder Made of a Hinge [33]

The broom holder shown in the sketch is made of an ordinary hinge
with one wing screwed to the wall. The loose wing has a large hole
drilled in it to receive the handle of the broom. The manner of
holding the broom is plainly shown in the sketch.
--Contributed by Theodore L. Fisher; Waverly, Ill.

[Illustration: Broom Holder]

** Making Proofs before the Negative Dries [33]

A correspondent of Camera Craft makes proofs from his developed,
but unfixed, negatives, by squeezing a sheet of wet bromide paper
into contact with the wet film and giving an exposure several
times longer than would be required under ordinary conditions,
using the paper dry. If the developer is well rinsed out of the
film, the exposure to artificial light necessary to