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ne arti te tne ey cs 33g sig tia ets Peaeag gee Eat
Jo HOW TO MAKE MAGIC TOYS. 51
_ anendless strap, which goes round the vertical shaft, to -
_ play through it freely. f your bottom is of brick, youcan
take a couple of bricks out. ‘
This endless strap you can place round the wheel of a
lathe, for instance, and so utilize the power of your
windmill, Ts coos a
_ Should the wind at any time be very strong, the friction
‘is apt to set fire to some of the woodwork ; and in such
cases you should take the sails off one or two of the
frames, so as to decrease the speed at which they revolve.
Thus, in the whole construction of your windmill, you
see there is nothing difficult. The axle, the cog-wheel for °
that, and the one for the vertical shaft, and the bearings
for the lower end of the axle and the cylindrical arch, as it
passes through the head of the mill, are all the ironwork
- you require ; a few stout deal boards and a circular piece
of elm, about three feet six inches, by the way, you will
find about the most useful length, all the woodwork ; and
with these you only want a wind to make the mill go. A
fair wind we need not wish you, for a miller who can turn
his mill to meet all winds, there can’t be a foul one.
How to Make a Miniature Geyser.
_. Most boys have read about the boil-
ing springs of Iceland, and perhaps
they would like to imitate them on a
small scale. ‘This may be easily done fy
' with a little trouble and care. In the i
engraving, A, is a boiler, which may
be made of any size, and is supported
on three legs over a spirit-lamp, D. C
- is a basin of tin, joined to the boiler by
the long and narrow pipe, B, which re-—
presents the tube of the natural gey-
ser. Having made this, fill the boiler
and tube, and part of the basin with
water, and apply the lamp. It may be
as well to mention that the water in
the basin never boils, owing to the
length of the tube, although that in the.
boiler does, When the boiling begins,
_ the steam for in A, bubbles at certain
intervals up the pipe, B, and as soon
as the water thoroughly boils, the
steam gains sufficient strength to
shoot out the water in the tube above
it to some little height above the basin
which serves to catch the water as it
falls, In exhibiting this toy it appears
more wonderful if the lamp, boiler and
tube are hidden. This may be done by placing them be-
tween two chairs with a piece of baize over them, and al-
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