The Portland daily press., 1889-11-30

u. a.
have again run little to far ahead. must
lay special stress on the necessity Of rem0y-
ing all sharp edges and points from the wood
and metal; every edge and point will allow
electricity to stream off. The next point Is
that all the wood work must be polished or
absorb moisture, which would be fatal to our
machine. Take four dry tumblers, place
them ON the floor as four feet to hold ary
piece OF wood, stand on this, with one hand
resting on the prime conductor. Ii the
machine is in good working order, which win
be determined by the weather and condition
of the room, the drier the better, your beard,
Supp0sing you have one, will appear lumi-
NOUS in the dark and one touching it will
receive shock. Now let someone turn on
the gas, put your finger close to the burner,
without touching it, the spark which will
dart from you will ignite the gas, to the
wondermeDt of the uninitiated. Whilst we
are working we may as well make Leyden
jar; procure an open-mOuthed glass, such as
Is used by cOnfectioners as show glasses,
measure off a piece OF tin foil as long as the
diameter OF the jar, and supposing the jar is.
say, inches high, the foil should bet inches
deep. Lay good coat Of paste or strong
gum on one side of the foil and fix smoothly
on the inside of the glass close to the bottom
ieaVinga clear space Of two inches at the
top. When this is fixed firmly, having no
folds in the foil, cut piece as large
as the bottom give this coat of paste
and lay it ON the bottom inside. Now cover
the outside and bottom in the same way, see
ing the foil is on level both outside and in,
and not nearer the top than 2 inches; If
much nearer than this it might, when highly
charged, discharge itself over the edge. Now
make kind of cap or bung of wood to fit
the tGp, take inches of stout brass or copper
wire. on one end solder metal ball. Suppos-
ing you cannot easily get that, take small
wood ball, say l inch is diameter, firmly
drive the brass wire into it, and cover the
ball with foil, seeing that the foil touches
the rod. Now pass the rod through the cap
of the jar, the ball being outside. Make a
chain Of copper wire long enough to reach
from the end of the rod to the bottom of the
jar.
While you have been doing this we will
suppose the parts on the jar is dry. Now
place both the jar and machine before fire
to warm them and keep them perfectly dry.
Bring the knob of the jar close to the knob
of the prime conductor and turn the machine.
When you have given say twenty or thirty
turns of the handle, take hold of the jar with
one hand touching the knob and the other
the foil, | take it for granted that you will
say Obj IL most emphatic manner, with.
out the slightest generalization or mental
effort.
There is just word to say before closing.
Before the ends of the cylinder are eemented
on, see that the inside of the jar is perfectly
dry and free from dust For some time be-
fore the end is fixed, place the jar in warm
oven so that all moisture is absorbed.
would again insist on having all sharp edges
and points removed from wood and metal
parts. Let the wood be perfectly dry, made
perfectly smooth and well vanished or
polished By following these directions a
good useful machine will be the result, the
total cost of which will not be more than,
seventy-five cents.