The L'Anse sentinel. (L'Anse, L.S., Mich.) 18??-current, 1891-09-26

many directors, but this can Ia
avoided by means OF q glass ball,
lessening the brightness OF the light
about 20 per cent. The brightness
of the white and violet rays OF the
electric light is best overcome by "
yellow shade; the yellow and red OF
gaslight by blue shade. In using
gaslight it must be kept at q certain
distance on account OF the immense
amount OF heat evolved, while in us.
ing the electric light It may be brought
near by, the disagreeable intensity OF
the light being lessened as much as
necessary. According to the investi-
CATIONS OF Renk, gas jet furnishing
as much light as nm Edison burner,
will give off twenty times as much
heat as tho latter.
The Munich Court Theater was the
scene OF some interesting experiments
to prove this point. The theater,
while empty, was lit up with gas, and
in an hour the temperature in the gal
lery was raised from 100 to go r.;
with electric lights OF the same power
the change was from 100 to Ito.
When the house was filled the differ
ence was not SO great, for human be-
ings also produce u great deal OF
warmth; with gas the final tempera-
ture was 22SoR-a distressingly
warm temperature-while with cleo.
tricity the last temperature was 17.6'
r. (720F.), a temperature which IN
easily borne.-Brooklyn Citizen.
Ammonia as a Motive Power.
A most successful test was made OF
the use ofammoniG rs amotive power
to displace steam. The test was the
first that has ever been made on a
marine engine, and the trial was most
satisfactory. An acknowledgements
plant has been fitted out on the tug
4. w. Hartley, which made a trip up
and down the river subjectins the new
scheme to q practical test. 1t is
known as the Campbell ammonia en-
CINE system, and it's workings are nov
el and interesting, not only to the
mechanical and scientific circles, but
also to the laymen OF the industrial
world.
An ordinary engine can be convert
ed into Campbell ammonia engine
simply by the addition OF a genera
tor" which is much like boiler
Steam is used simply for the purposes
of heating the aqua ammonia in the
generator. the heated ammonia ex-
pels gas, leaving weak solution OF
ammonia in the bottom OF the boil
er-like affair. When, by rising
the temperature Of the ammonia,
sufficient power is generated, the
throttle valve is opened and the gas
passes into the cylinder OF the engine
and propels the piston rod in every
way the same as steam. 1t is here
exhausted the same as steam, but at
this point the gas is cooled and con-
Quoted back to the generator. Before
it reaches the latter vessel it is carried
by a "spray COLI to point where
the gas comes in contact with the
ammonia solution which has been
rejected from the generator, and here
the solution Is recharged by absorb
ton and by the natural affinity
existing between water and ammonia.
By this means the same body OF am
monia is used constantly, exhausting
itself only to be recharged with new
life and to be returned to the genera
tor. The same is true of the water
used. The steam in the generator
imparts its heat to the ammonia, and
is thereby condensed and carried back
to the boiler to be used again. In the
ammonia engine there is absolutely
no waste. On the other hand, there
is saving of coal, as the engine can
be operated on one-half the amount
of fuel On the Hartley only
one of the two furnaces was used,
and there was all the speed and
pressure that could be desired. Phil.
adelphia Record.
How to "Eleotrooute" Fish.
The "Sure Thing" fish. killer has just
been invented. To unlucky Izaak
Waltons who have been whipping
streams in vain for years, it should
come heralded with Joy. The Electric
al Review explains clearly the
fell device. A movable cap slides
freely on a brass spindle and is held in
position by spring. A flexible wire,
rubber-surrounded, in the line. The
hook is insulated with rubber tube,
except on the point. The battery
and condenser are connected in the
boat, one side Of the battery being
grounded by plate in the water, the
other joined to the spindle Of the float.