The daily dispatch. [volume] (Richmond [Va.]) 1850-1884, 1878-09-17
/ copper rods. These rods may be tapped

Tn the factory q ateIemacbon would be placed
| OF a power sufficiently great TO run the
sbaftipg. Thus the entire power required
by the State of New York might be taken
off allng the line OF the main conductors.
The amount OF electricity taken OFT at any
one point would be readily regulated in the
same way in which the current taken from
battery for teIegraphic purposes Is now
regulated-that is, by introducing suitable
resistance in the local line.
| So powerful are the magnets attached to
this instrument that tbe party While ob-
serving it were compelled to leave their
watches in another room, else they would
have been magnetized.
| Mr.. Edison believes that he can also
| assist MIR. Wallace in perfectiug the tele-
machon, that power may be transmitted
from one point to another rs though it
were q telegraphic message. Already by
means OF this instrument Mr. Wallace is
enabled to transmit the power OF the Natl
gatuk river quarter OF mile. The power
| OF this stream is great enough to drive the
ponderous machinery OF the Wallace factory,
where three hundred men ale employed. A
series OF experiments with the instrument
| Inns shown that in the transmission OF this
enormous power by electricity only twenty
per cent. is lost.
In this instrument the electricity is pro-
duced by the Wallace dynamo electric ma
chine, no battery being used. Four large
| clcctro-magnets are placed Win Ihelr pores
facing each other. On an axis parailel W,th
and situated between them IS a disc OF IRON
carrying upon it's opposite faces 70" Oh
eIectro-magnets, thirty in number, on each
face, whose poles, facing outward. rcTolVe
as close as possible to the poles OF the large
magnets, called the field OF force. On
the same axis, but outside OF these
discs, strips OF copper are placed equal
! in number to the magnets on the discs,
each strip of copper being connected
to one end OF the wire on the magnet. Inc
other end OF the wire goes to the next strip.
Each strip, therefore, is connected 10 Tue
last end of the coils and TO the first END OF
that Immediately following it. " hen TIE
disc, with its magnets, Is reTolVed ny any
| power, the weak magnetism remaining IN
the iron itself generates current OF elec-
tricity in the wire surrounding these mag
nets. In virtue OF the principle discovered
bv Farraday, that whenever a conducting
wire is moved in the vicinity or magnet
current OF electricity is caused TO clrcuia'e
| in that wire, the feeble current thus gene
rated flows around the magnets or Tue
field of force, increasing their magnetism.
This increased magnetism reacts upon tue
revolving magnets. increases the eiectfic
current. and so alternately until the mag
netiSm attains maximum, and that maxi
mum is generated in the wires Of the rerolY-
inr mafnets. This current bears for each a
perfectly definite ratio to the power con-
sumcd, and they are capable OF converting 80
per cent. Of the power applied into elcctrlci.
| ty. The electric current generated Is carried
| by two copper wires to second machine,
the tehmachon. This effects the reverse OPP
eration-that is to say, the rcc9nrerSlon or
the electricity into mechanics! power. Tne
te;amacbop consists OF teld OF force
and a revolving armature. This field or
force consists OF twelve large c!ecLro-mag-
nets in two sets of six each, the poles OF
each set facing each other anu connected
together by heavy bands or bridges. In
the space enclosed by these magnets, ana
parallel with them, is the armature AXIS
supporting an armature consisting OIL ring
OF iron wire serving as chord, around
which is wound IN insulated copper wire IN
two series OF fifty coils. The end OF these
wires come out alternately TO the right
and left OF the armature, and are con-
nected with two break-pieces upon their
axis. Six springs or brushes of copper
wire press upon these break-peccs, each
pair of brushes facing each other, and .op-
posite pair OF magnets in the field or
force. The electric current entering the
machine presses round the field OF force
and maynetizes the magnets. At The same
time it passes through the armature. mag
netiZing that. so that the poles OF the arma-
ture nearest the poles OF the field magnets
are of the opposite name. In conse-
oucnce Of this the icld-of-force magnets
attract the poles OF the armaturc 10
move. But the motion in its new posi-
ton brings other portions OF the break
! pieces in contact with the spring and
causes redistribution OF the magnetism.
Again attraction takes place as before, and
again the direction OF the current is changed
By the break-pieces. The magnetic effect
being continuous, the rotation is continuous,
increasing constantly In speed until the
friction and the magnetic power baance
each other.
In Sundays experiment the hodcmctcr
showed that the machine made 5000 reyolu-
tons in q minute.
The electricity from the wonderful tcle-
plachon may be applied to illumination:
1t snlves the problem OF the supervision OF
electric lights. Both the Wallace foundry
and the Farrell foundry, near by, are lighted
by these lights, the army OF men being
formed in two divisions, one working
during the day and the other up to mid
night. Thickly studded as these fouI.
dries are with heavy machinery. and OBJ
: structed as the light must necessarily be
by the pondcrous cranes, drills, sup
port ing columns and projections, cleal
lirnt is thrown upon the machinery, per:
sectly illuminating it. Adjustments to the
thrty-second of an inch may be made with
out the least strain upon the eyes. a beau
: tifu effect OF this light is It's pollrlzatlon-
: that notified appearance which it assumes
when falling through glass. This is the
only artificial light, it is said. that is capable
of producing 1t.
The following is an estimate, made by ar
expert, of what it would cost to light the
: streets OF New York with these lights: The
,, average street-burner gives light equal tt
ten candles. Assuming that one Of tn(
eight electric lights produced by the power
OF one machine is equal to 1000 candles
and assuming that there are 5000 lamps
each lamp burning twenty cubic feet OF sas
an hour, ut cost OF one dollar per 1000 feet
: it would require 12s Of these machines tt
furnish all the light required. The cost o
the gas by this rough estimate would bt
s1OO an hour. To produce the same ligh
by electricity would require say thirteel
machines placed upon towers. The cost O
single light equal to that OF 1000 candle:
would be three cents an hour, Each ma
chine. giving 1000 candle-lights, would
, cost, therefore, twelve cents an hour, an(
thirteen would cost S1.56 an hour.
A farmer in Washington, Iowa, oWnins