New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1897-05-28
T4CTTH TUBE LIGHTING.
EXHIBITION OF ID. MFARLAN MOORES SYS-
TEM-RESULTS SECURED.

TEM-RESULTS SECURED.
A fresh exhibition of d McFarlan Moore's sys-
tenn OF vacuum tube lighting was given last even
Ing in the laboratory of the Moore Electrical Com
pany. I'm Newark. for the purpose of showing the
improvements effected by the inventor since the
last public display. made In the Grand Central
Palace. In this city. a year ago number OF
well-knoWn electrical experts present. a
booth thirty feet long. twelve feet wide and eight
or nine feet high, had been parti,ioned off and
lined with white cloth. II was illuminated by a
series Of tubes two inches in diameter and six or
eight feet long running around the apartment
where a picture moulding would ordinarily be
placed. An extra line of lamps extended length
wise i'm the middle of the ceiling. Altogether, there
were fourteen Of these tubes. A subdred CULVER
ing white light filed them. II was sufficient 10
read by and pleasant to the eye.
Tie Moore tube differs from the old Geissler
tube of the nigh school and college only in details.
Il is much longer The in II IL not hign
The electrodes, or metallic terminals, which bring
o nt Of the ends instead Of wires piercing the
glass. The essential feature Of the apparatus Is a
70 narate device whose function IL II to interrupt
this current with great frequency and abruptness.
The form Of nterrupter used last year was !, a q
high vacuum tube and vibrati ng to and fro This
had some mechanical mperfections which have
since been overcome. that II now oscillates at
the rate Of 5000 or 10000 times minute, instead
ever. Mr. Moore has also invented new device to
perform the same Office. 1t rotates In vacuum
EMPLOYS something like the brushes" and com
mutator' of a dynamo TO make and break the cur
rent. -,
r. j. Vessels, president OF the Moore Electrical
Company. made short address, announcing that
this and other improvements In the system had
been made. The more frequent Interruptions i'm
proved the quality OF the light One vibrator would
now do for a dozen or two dozen lamps, whereas
one was needed for each light las; year. This sim
pined the apparatus greatly. The system OF wiring
had also been bettered. lie was not ready yet to
supply data in regard to the amount OF power
needed to operate the lamps. but he declared that
"a in had
last year that much more light was obtained
from each tube az from an incandescent light with
the sa me amount OF current.
Mr. Moore was introduced and gave several Illus
trations OF the possible uses OF his light for or
binary and decorative purposes and for producing
sta ge effects like lightning. He then had pho
tograph taken OF the audience. the exposure last
ing only about twenty or twenty-five seconds. One
OF the most striking experiments employed sealed
tube from which the air had been exhausted. and
which was entirely detached from all wires. The
was produced in this by induction when the tube
was held between the concealed poles OF a cir
emit Mr. Moore prophesied that some time candles
o this would he used which would be rendered
luminous by having metallic paper on the sides Of
the room and properly connected with his APP
paratus.
For years such eminent electricians as Tesla
Lodge and Ebert and a number OF less famous
men. have been wrestling with the problem OF pro-
as any public demonstration has been made, Mr..
Moore seems 10 have gotten the best results. al
though he admits that there IL still room for i'm