The Manchester journal. [volume] (Manchester, Vt.) 1861-current, 1880-01-29
EDISON. ELncrRIo LIanr.

found the great inventor in his library
over an Office where the accounts are kept.
AS he has hundred men in bis employ,
strict system is necessary. Edison is q
tall, thick set, pale man, with shnken
eyes, and the general air ofa man accus-
toned to pass night after night in expert
ments, rs he sometimes does. His assist.
ant, Mr.. Bachelor, showed me over the
premises, Edison having already explain
ed everything TO some thirty different
visitors and having no voice left. First.
was taken into furnace room in which
the new celebrated carbonized horseshoes
are made. Little bits of the best bristol
board are heated for 20 minutes 10 IN
iron matrix, coming ont az carbonzed
black threads, something IN the shape Of
horseshoes, about an inch across. Edison
experimental with 1000 kinds OF cards
before getting the beat. II is found that
this carkonized card stands the heat ofthe
electric current better than platinum.
The next step 10 the manufacture of the
lamp is 10 fasten two platinum wires 10
the horseshoe, one to each end. The
wires are an inch or so long, and 14.10O0
OF an inch 10 diameter. Then the horse.
shoe, with the two bits OF wire hanging
from it, is inserted In q glass bulb about
the size ofian egg, and open at the top.
The bottom of this bulb is heated over
spirit lamp, and when at melting point,
the wires are permitted TO penetrate the
glass, the horseshoe remaining inside and
with the wire projecting through The bot
tom of the glass aud firmly welded into
it. The glass blower, who 10 a man
brought over from Germany on purpose,
then draws the open top of the bulb to-.
gelher in The shape ofa tube, and the
lamp is taken 10 Geisler vacuum pump,
where by All Improvement of Edison's the
air is exhausted until only one millionth
remains. As soon as the right vacuum is
obtained the lamp is sealed up, finished.
II nov the electric current is passed
into the lamp by means OF The platinum
wires, the catbos horseshoe instantly be-
comes incande,cent, giving forth clear,
soft, steady light, without the slightest
flicker. Edison uses for generating the
current modification OF the gramme
msgneto-electric machine. From one OF
these machines, which occupies floor
space OF about two square feet, he can get
current enough TO light so lamps Of the
intensity OF one four foot gas burner each.
II requires about six horse power to run
one generating machine. As steam
power in large quantities In New York
city costs about one cent an hour per
horse power, 1t will be seen that the
light will coat about one-eighth Of cent
an hour, or for an evsniHg Of four honrs
each lamp will cost half cent. Edison
10 confident that DO matter how low The
gas companies put their gas be scan selI
better light, cheaper. When | wAs 10 the
buildings there we're thirty ofthese lamps
VNshAukt ~H AtNA@h pNtN SttNeSAhh Hkbhs
Many Of them had been burning night
and day for 2l days. No one h more
surprised 81 their success than Edison
bimsell. As yet, however, the test has
been too short to assert that . complete
success has bsen made. 1.-THE lamps
burn six months, lbsn Ii will be time TO
seli gas stock. The same cnrrent which
10 Hsed for the lamps can also be utilized
for running sewing machine or pumping
wster. saw sewing mschlne 60 beau
tlfully BY fast switching OF The enneat
used 10 lght one burner into . little cleo
tric motor II lis objected that the carbon
horseshoes will not last more than >
month OF two. Only lime can deciis
these points. Edison himself ls the hist
70 say that six month"; time is Necessary.
The lamps will cost shout twenty-five
eeuis 10 make, and ths whole cost of
mskius the ehsngs from gas 70 electricity
viii not be more Than ten dollars for an
ordinAry dwelling hoRss.
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The 0uebes legislative ccuncii IA 10 ba