ner irons are also screwed to, and supported in a
vertical position by the wood standard D, which is 4 in. wide and
of any desired height. To this standard is secured the wood
shield-shaped piece E by the screw G upon which it turns. A
semi-circular slit is cut in the piece G, through which passes the
set screw S. The telescope is secured to the piece G by means of
the pipe straps FF. Rubber bands are put around the telescope to
prevent rubbing at the places where the straps enclose it.

The wood pieces were made of mahogany well rubbed with linseed oil
to give them a finish. The corner irons and set screws or bolts
with thumb-nuts can be purchased at any hardware store. The pipe
straps of different sizes can be obtained from a plumber's or gas
and steam fitter's store. With this device, either a vertical or a
horizontal motion may be secured, and, after bringing the desired
object into the line of sight, the set screws will hold the
telescope in position. Anyone owning a tripod can construct this
device in three or four hours' time at a trifling cost. In Fig. 1
is shown the side view of the holder and stand, and Fig. 2 the
front view.

It may be of interest to those owning telescopes without solar
eyepieces to know that such an eyepiece can be obtained very
cheaply by purchasing a pair of colored eyeglasses with very dark
lenses and metal rims. Break off the frame, leaving the metal rims
and nibs at each end. Place these over the eyepiece of the
telescope and secure in place with rubber bands looped over the
nibs and around the barrel of the instrument.
--Contributed by R. A. Paine, Richmond, Va.

** How to Make an Electrical Horn [218]

Secure an empty syrup or fruit can, any kind having a smooth flat
bottom will do. If the bottom is not perfectly flat, it will
interfere with the regular tone vibrations, and not produce the
right sound. Remove the label by soaking it in hot water. Take an
ordinary electrical bell and remove the gong, clip off the
striking ball and bend the rod at right angles. Cut a block of
wood 3/4 in. thick, 5 in. wide and 8 in. long for the base. Fasten
the can on it with a piece of sheet brass or

[Illustration: Tin Can and Bell Parts]

tin as shown in the sketch. Mount the bell vibrator on the base,
using a small block of wood to elevate it to the level of the
center of the can, and solder the end of the vibrator rod to the
metal.

Connect two dry cells to the bell vibrator, an