Sun's Light in a Magic Lantern [251]

The light furnished with a small magic lantern does very well for
evening exhibitions, but the lantern can be used in the daytime
with good results by directing sunlight through the lens instead
of using the oil lamp. A window facing the sun is selected and the
shade is drawn almost down, the remaining space being covered by a
piece of heavy paper. A small hole is

[Illustration: Magic Lantern]

cut in the paper and the lantern placed on a table in front of the
hole, the lamp having been removed and the back opened. The
lantern must be arranged so that the lens will be on a horizontal
line with the hole in the paper. A mirror is then placed just
outside of the window and at such an angle that the beam of light
is thrown through the hole in the paper and the lens of the
lantern.

The shades of the remaining windows are then drawn and the lantern
is operated in the usual way.
--Contributed by L. B. Evans, Lebanon, Ky.

** A Handy Drill Gauge [252]

The accompanying sketch shows a simple drill gauge which will be
found very handy for amateurs. The gauge consists of a piece of
hard wood, 3/4 in. thick, with a width and length that will be
suitable for the size and number of drills you have on hand. Drill
a hole through the wood with each drill you have and place a screw
eye in one end to be used as a hanger. When you want to drill a
hole for a pipe, bolt,

[Illustration: Drill Gauge]

screw, etc., you take the gauge and find what size drill must be
used in drilling the hole.-Contributed by Andrew G. Thome,
Louisville, Ky.

** Stove Polish [252]

A good stove polish can be made by mixing together 1 lb. of
plumbago, 4 oz. of turpentine, 4 oz. of water and 1 oz. of sugar.
Mix well and apply with a cloth or brush.

A Home-Made Daniell Cell [252]

An effective Daniell galvanic cell may be constructed from
material costing very little money. A common tin tomato can with a
copper wire soldered to the top forms the jar and positive
electrode. A piece of discarded stove zinc rolled into an open
cylinder of about 1-1/2-in. diameter, 5 in. long, with a copper
wire soldered at one end forms the negative electrode.

To make the porous cell, roll a piece of heavy brown wrapping
paper, or blotting paper, into a tube of several thicknesses,
about 5 in. long with an internal diameter of 2 in. Tie the paper
firmly to prevent unrolling and close up one end with plaster of
par