Memphis daily appeal. [volume] (Memphis, Tenn.) 1847-1886, 1876-09-23

are eoiled upon little reel in one side Of the
box. When The work of charging begins these
boxes, with their contents win be carried
placed in the holes, where they viii be ss-
cured Lot only by braEs springs attached 70
ssSaa ssGn one, put also With white pine WEDGES
des OF the holes. When all tue cartridge of
the group have been inserted, r connection is
Irg wire on the reel and the latter is then car
rled up TO the battery paying out the wire as IL
goes When ali the groups have been completed
In this way 1t will only remain to connect the
wires in circuit with The battery from which
the Nplodirg spark Will be sent. Ii has been
customary in former works bearing any re-
essnblance to fhe present to have but one
wire ms4e the circuit of all the holes aud
then explode them by bringing the two ends
of the wire together in circuit at a safe dis
however, is of such magnitude, and the num-
Der of holes to be fred so far exceeds that of
any former blast, that it was deemed unsafe
TO trust to single wire. Hence the grouping
ar :angern ent described. This having been de-
ciced upon, the 7obIem OF forming circuits |
roIlnd twenty-f Se diff rent groups slmultane- |
ously presented itself To accomplish this re-
suit very ingenious conirivance called |
connecting frame" has been Invented. 1t |
consists of a tripod of pine wood about four |
fest high, on the top OF which Is firmly fixed |
a disK OF wood two feet in diameter. Lying /
upon this disk is a corresponding ore whica |
slides up and down in groved updghts. The /
i'd "a is TO attach one end of each pair OF wires
TO the bottom dusk and the other ssnd to the |
latter is lowered down into contact
with its fellow the end of each pair
OF wires will tou. simultaneously and
impossible 70 bring the bare ends or the
wires into contact with absolute certainty the
bottom wires will be fastened in bupches OF
eight and brass pins driven down through the
disk, the top ends OF which, projecting above |
the wood, are followed into cups and filled
with mercury. The ends OF the upper wires |
in like manner are fastened, each in line with |
its fellow wire below, 10 brass pins driven
through the top disk. TheEe pins are SO fixed |
tnat when the disk tu which they are fastened |
is 10 Tered their points will drop into cups of |
thus insuring perfect circuits. |
I Connection will be made. Of course, between |
each pin, aoove and below, with the battery. |
When the time of firing the mine arrives
the upper disk Will be held up from contact
powder. At the proper moment the cartridge
will be fired by spark firm a small battery
located on rising ground about quarter of
mile east of the shaft, and the disk falling |
with its combination of pins and wires win |
complets the twenty-five circuits with abso- |
la e certainty and at the same moment This |
frame is to be located on the top |
Of the bomb proof structure near The shaft, |
and in which the latter Is placei. The latter
cells eacn. The cells are filled with electro
p atom, a solution of bichromate OF |
potassa In sulphuric acii, and the plates are
Of ziuc and carbon, four inches wide and six |
inches long. The cells are connected in
groups of about forty TO increase the inten- |
siiy. This sort of baJtery-which Is known
|
the galvanf- m generated is of very short du-
ration, so that to utilize its greatest force IL |
must be used very soon after its formation.
To arrive al this another ingenious arrange
ment has been coutrived. The batteries have |
been arranged In two hoIiZ )ntal rows in two |
massive wooden frames, and the one hundred |
and fifty gallons OF duid necessary will be |
poured into the boxes, Meanwhile the plates |
are suspended dir. city above each set in line
with its box. When all is ready for the blast |
the plates Will be lowered into the LIQUID by q |
u ank attachment, and then while the bat
terry is exerIing It's most intense power the cir
cult will be completed and the end OF seven |
years thinking, experimenting and working
will be achieved.