The Bottineau courant. (Bottineau, Bottineau County, N.D.) 1895-1929, 1915-01-22
4 NEW ILLUMINANT.

n NEW jllUMINANI.
Nitrogen Filled Lamp Likely to Super.
seds Older Lighting Methods.
Drawn wire tungsten lamps shatter.
ed all preconceived ideas Of interior
lighting and put the whole question Of
illumination on a new plane. And
hardly has the drawn wire vacuum
lamp esta blished its position before the
gas filed metal dlament lamp IL usher
ed into the lighting world. The fact
that at the present stage Of its de.
velopment it does little to assail the
position Of the lamp IL Of no
consequence. The essential point IL
that the nitrogen filed lamp. Y e IA It
Ia today, cuts the vacuum efficiency
record all to pieces. and 1t ia inevitable
that within a very few years It must
drive the earlier lamp out Of many Of
it's fields.
Apart from that it will. In addition.
develop many a new field of its own.
and 1t ia probable that one Of these
fields is going to be the field of interur-
ban highway lighting-an entirely new
field way. by the way. and one which
up to the present has received practi.
cally no study. Those who desire to
acquire the reputation Of u prophet
should lose no opportunity Of placing
themselves on record in this matter
Here we have one Of those revOlu
lions in little which is surely coming
and of which the first signs are already
visible. In ten years. time municipal
and county authorities will be spend,
ing vast sums Of money in lighting the
interurban roads. and even the country
roads-money which they would never
think of apprOpriating now for any
such purpose Engineering Magazine.
Naval Range Finder.
Trigonometry. by the use Of mirrors
OF known and varying angles, is used
to determine. mechanically. the dis
lance of a ship at sea. The instrument
used is called a range finder. and with
out it the big guns Of q modern battle.
ship would be practically useless. In
operating the instrument the ship ia
0A6hSCO AIOu6u q IClCSVOHC lIOu luc
reflections IN two object mirrors. each
located at the end and on the side Of a
tube about twelve feet long. the axis Of
the tube being at right angles to the
line Of sight. The object is ~refracted
and reflected by q system of mirrors
80 that both images are made to coin
eide. The right hand object glass re-
fleets only the upper half Of the ship.
a. the masts. tunnels and rigging.
while the object glass Of the left of the
observer reflects only the image Of the
lower half of the vessel. or the hull
When sighting q ship the images will
appear to be Offset one from the other.
the masts one way and the hull the
other. When they are brought 10.
gether. by an adjustment screw. an
index plate reads the distance the ship
b from the observer In yards.
Man Too Heavy For Wings.
Mathematicians have calculated out
that man Is too heavy ever to be sns-
tanned In air by the power Of his own
muscles. no matter how large the
wings are which he fastens to his
body. The weight limit Is probab bly,
approached BY the largest. birds. such
az the Australian crane. which still
flies. although It weighs about twenty
pounds. The ostrich long ago gave mp
all hope of winging tts way through
the air An aeroplane can be built.
say the experts. which will sustain =
man and use hut three horsepower.
but IA the hes athletes can exert only
a maximum Of abOnt two horsepower
for fifteen seconds at a time It ia i'm.
probable thar mans dream Of flying
az do the great birds of the air will
ever he realized-he will always be
dependent on a machine.
Organized For Fire Panic.
At the top nf the hack Ut each seat
Tn the Metr0pni''"" '',"", House in
New York city he number
OF the exit which il,. ,n'r>nn sitting d.
rectly behind Is to use in case Of Gre
OF panic Each exit Ia prominently
marked and can easily be located This
ts st~andardiZtng a condition with the
aim ut avoiding confusion and prevent.
ing waste. Engineering Magazine,
~Japanning Springs.
In japanninR springs the best ptac-
tee Is to put them into metal haskets.
dip the entire basket into the Japan.
withdraw and drain and then bake the
springs Just IA they lie In che bnsket.
This will give . uniform coating of
Japan