sket splash." The diameter of this sphere was about
3/5 in., and the height of the fall about 6 in. Examination of the
photographs shows that the liquid, instead of flowing over and
wetting the surface of the sphere, is driven violently away, so
far as can be seen from the photographs, the upper portion is, at
first, unwetted by the liquid. The gradual thickening of the
crater wall and the corresponding reduction in the number of its
lobes as the subsidence proceeds is beautifully shown. Thereafter
there rises from the depth of the crater an exquisite jet which in
obedience to the law of segmentation at once splits up in its
upper portion into little drops, while at the same time it gathers
volume from below and rises ultimately as a tall, graceful column
to a height which may be even greater than that from which the
sphere fell.

** How to Make a Stick Pin [164]

A fine stick pin or button can be made from a new one-cent piece.
Carefully file out all the metal around the Indian head and
slightly round the edges. Solder a pin to the back of the head
when it is to be used for a stick pin. If a collar button base is
soldered to the back of the head instead of the pin it can be used
for a button. These can be gold plated by a jeweler and then you
will have a neat pin or button, or a good emblem for the Order of
Redmen.

[Illustration: Stick Pin]

** How to Make a Miniature Electric Locomotive [165]

A miniature electric railway is a thing that attracts the
attention of almost any person. The cost of a toy electric
locomotive is beyond the reach of many boys who could just as well
make such a toy without much expense and be proud to say they
"built it themselves." The electric locomotive described herewith
uses for its power a small battery motor costing about $1. The
first thing to do is to make the wheels and axles. If one has no

[Illustration: The Different Parts for Making the Electric
Locomotive]

lathe, the wheels can be turned at some machine shop. Four wheels
are made from a round bar of metal, as shown in Fig. 1. Each wheel
is 1/4 in. thick and 1 in. in diameter, with a 1/16-in. flange and
a 1/4-in. hole drilled in the center. Each pair of wheels is
fitted on a 1/4-in. axle, about 2-5/8 in. long. One of the axles
should be fitted with a grooved belt wheel, as shown. Make the
frame from three pieces of heavy brass, as shown in Fig. 2.

The first piece, or main part of the frame, is made from bra