The daily morning journal and courier. [volume] (New Haven, Conn.) 1894-1907, 1903-01-19

:.
American breeder Will breed to this
type, and breed truly, and then VIII ed
UCate, and be able 10 show" what such
American horse can d., there is the
great hunter market Of the world wait
ing at his door. FLe must have animals
with speed. courage, good looks, good
breeding, clever at their fences, steady
and true, and those first in the market
will have dmand for all they can pro-
duce. at figures which to-day look like
q dream. But the horses must make
goUd.-New York Eevning Post.
THE MERCURY VAPoR LAMP
American electricians have been
familiar for nearly two years with
Cooper Hewitt's mercury vapor lamp
and can we'll understand the en-
tEusiasm with which Lord Kelvin and
other British experts regarded it when it
vas first shown to them last Friday
Several theoretical and practical ques-
ti0ns concerning the invention are not
fully solved. Possibly Mr.. Hewitt does
not himself believe that it has reached
its full development in every detail
But as il stands to-day his lamp re-
presents a dcgree Of originality and an
amount of experiment and calculation
which have inspired hearty admiration
in those who best understood the de-
vice and The work of which 1t Is the out
come.
III outward form Mr.. Hewitt's lamp
reminds one Of the Gessler tube
Macfarlane Moore's beautiful demon
STATIONS six years ago and some of the
marvellous exhibitions Of Mr.. Tesla.
In these, however, the effects were Sc
cured by rapidly alternating or inter-
rupted high pressure currents. Both the
means and the principle We're different
from those employed in the mercury
yapor lamp. In the latter the gas is
made incandescent, as is Mr. Edison S
carbon filament, simply by resistance
to the current going through it and by
heating in consequence. For this SER
vice a low pressure continuous current
is sufficient There is no induction or
wave phenomena or "electrOstatic dis
charge"
From the popular point of view the
device possesses several merits. The
apparatus is simple. and light is OBJ
tanned almost Immediately upon turn
ing on the current. In both respects
the Hewitt system seems superior to
the Nernst system. another recent
t,1C hoAY1
some question as to the color of the
glow emitted. But a violet tinge Is less
objectionable to most people than the
groenish light which characterized the
early Welsbach mantles. Beside, the
former may yet be entirely corrected.
just as the latter has been. One of the
most important recommendations Of the
mercury VapOr lamp Is its economy.
Mr.. Hewitt believes that he gets a CIV
en- amount Of light by the expenditure
Of only one-third of the energy required
by the arc lamp, and from one-eighth
to one-tenth of that consumed by the
inCandescent lamp. If these estimates
are fully sustained by later tests a rad
ical Improvement in at least one respect
will have been secured. 1t remains to
he discovered Of course, how the lamp
itself will compare with the are and in
candescent lamps in cost, and how Of
ten it will need renewal. On the whole.
a favorable showing on these points
may be expected. Almost the only 9TH
er consideration then remaining will be
the possibility Of developing, after long
trial defects now unforeseen either in
outdoor illumination, to which 1t is best
adapted, perhaps, or in offices and
households.
Electrical engineers will feel more in
terest than the general public in Mr.
Hewitts other new invention men
toned in recent London dispatches.
When a low tension direct current such
as was once universally used for the
Edison lamp, is available Mr.. Hewitt
needs no extra apparatus. There is
growing tendency to-day, however, to
generate electricity for distribution in
the form of an alternating current, and
subsequently to change this into a di-
rect current The Manhattan Elevated
Railway Company does so. for instance
and in its sub-stations uses a machine
that looks like a dynamo, but is called
a rotary converter. There is likely to
be a growing demand in lighting as
we'll as traction service, therefore, for
apparatus performing this function;
and it is not incredible that the old
converter will be surpassed. Until
more Is known about Mr.. HeWitt's me-
chanism it's merits cannot be Judged
The dispatches speak Of Its diminutive
size, but that fact is not significant un-
less one knows how much current it
was called upon to handle, The first
cost and the efficiency of the two sys-
TENS must be fully known and the
principle of the new converter must be
explained before any opinion concern
ing 1t can be formed. Still, MIR. Hew-
tits ingenuity and mastery Of electrical
science Justify confidence in its utility
New York Tribune.
A COMPLAINT FROM THE