Newark evening star and Newark advertiser. [volume] (Newark, N.J.) 1909-1916, 1914-02-21
OPINIONS AND VIEWS FROM
THE EXCHANGES

| existence of the party of which he
lis the national leader. When the sug-
| gestion is made that Colonel Roose-
welt may incline toward an amalga-
nation of the Republican and Pro-
gressive parties they point TO the
pledge of faith which he made just
/ before he sailed for South America
and declare there is not the least
doubt that he intends to keep it.
y From Maine Colonel Roosevelt is
expected to go to Pennsylvania,
where his friend and ardent sup
porter, Clifford Pinchot, will run as
| the Progressive candidate for senator,
The Pennsylvania fight will be at
least three-cornered, The colonel will
then invade the Middle West, speak
| ing in both Ohio and Illinois, each of
which will choose a senator by popu-
| lar vote this fall. He is likely to go
to Kansas for one or more speeches,
where Victor Murdoch, the congress-
ional leader of the Progressive party
will be running for senator.
Seek Artificial Light.
From the Engineering Record.
A German engineer has recently
been making very exhaustive study
of the colors of the common sources
of light, which brings out some inter
esting facts. says the Engineering
Record. The first of these is that OF
the illuminants in present use none
comes very near to daylight. as that
term is ordinarily understood. Day
light is q mixture of direct radiation
from the sun and a considerable ad-
ditional amount diffused from the
blue sky or clouds. The latter COM
ponent has been taken out of the sun
light as it filters through the atmos-
phere and is, in part, restored by the
diffusion, the result being that ordi-
nary daylight contains perceptibly
more blue and less red than sunlight
The only light which, unscreened'
comes tolerablv near the ordinary
daylight is the Moore tube filled with
carbon dioXide gas. which is about
IS per cent. short on red and about
8 per cent. long on blue. Ontortu-
nately is is as source of light ex-
tremely inefficient, and various at
tempts have been made to use screens
over sources like arc lamps, mean
descent lamps and Welsbach burners
to correct them to daylight color; but
inesmuch as they are all weak in
blue and the intensity of the other
colors has to be greatly cut down to
make them match, all such lights are
in about the same class as the TUBE
in the matter of efficiency. A sun
light effect is easier to get. and
pretty close approximation is fur
nished by the magnetic arc lamp
which has too much red by less than
2 per cent. and not enough blue by
about 6 per cent.
All the incandeScent lamps-gas and
electric-are a long way from white
having in general two or three times
TOO much red and scarcely half
enough blue for a proper balance.
The arc lamps likewise are, generally
speaking, rather far from being
white. let alone a match for daylight,
although very much nearer than any
of the incandescents. The new nitro
gen lamps occupy an intermediate
position distinctly less near to white
than the arcs and very much
whittier than any previous m
candescents Finally, as freaks
in the list, come the vapor
lamps of various kinds-mercury arcs,
Moore tubes, neon tubes and so forth,
of which only the one previously men
toned approXimates white The mer-
curry lamp is a pretty good green,
while the neon tube, the most &C.
centric of all in color, is almost
pure light red
1t must De SuppoSeu lildi iiSoi ilSSS
to white, however, gives a just value
of a lamp for Illuminating purposes,
because it is quite well known that
nearly monochromatic lights, like the
yellow flame arc, the mercury tube,
and some others, really give very
acute discrimination of detail in black
and white distinctly better than does
daylight, and the last named is often
reviled by the metal polished on ac-
count of it's really uncanny capacity
for showing up spots which are not
as they should be. But, altogether,
the progress of artificial lighting
shows better and more useful color
year by year