deal of care the coins may be made to fall without
disturbing the water, the surface of which will become more and
more convex before the water overflows.

[Illustration: Dropping Coins]

** Hollow-Grinding Ice Skates [231]

The accompanying sketch illustrates a practical method of clamping
ice skates to hold them for grinding the small arc of a circle so
much desired.

The U-shaped clamps are made of 3/4-in. soft steel with the
opening 6 in. deep and 5 in. high and are bolted to a block of
wood, 2 in. thick, 6 in. wide and 12 in. long. The skate runner is
adjusted to the proper height by 1/2-in.. set and thumbscrews. The
block

[Illustration: Skate Runner Fastened in Clamp]

of wood holding the clamp and skate can be pushed along on the
emery-wheel table in front of the revolving wheel.

If properly adjusted, a slight concave or hollow can be made full
length of the runner, true and uniform which will hold on the ice
sideways and not retard the forward movement.
--Contributed by Geo. A. Howe, Tarrytown, New York.

** How to Make a Bicycle Coasting Sled [231]

The accompanying drawing and sketch illustrate a new type of
coasting sled built on the bicycle principle. This coaster is
simple and easy to make, says Scientific American. It is
constructed of a good quality of pine. The pieces marked S are
single, and should be about 1 by 1-1/2 in.; the pieces

[Illustration: Has the Lines of a Bicycle]

marked D are double or in duplicate, and should be 1/2 by 1-1/2
in.

[Illustration: Coasting]

The runners are shod with iron and are pivoted to the uprights as
shown, double pieces being secured to the uprights to make a fork.
The seat is a board, to the underside of which is a block, which
drops down between the two top slats and is secured with a pin. A
footrest is provided consisting of a short crosspiece secured to
the front of the frame and resting on the two lower slats. The
frame and front fork are hinged together with four short eyebolts,
E, with a short bolt through each pair as shown.

** Spelling Names with Photo Letters [232]

There are, no doubt, many amateur photographers who make only
occasional trips afield or through the more traveled thoroughfares
with their cameras during the winter months. Each one is generally
interested in working up the negatives that he or she made during
the summer or on that last vacation into souvenir post cards,
albums and the like, for sending to