The Raymer enterprise., 1914-10-08

the bat The extremely deIirats rot,,r. - a..
oats wings. together with the sansItj,o,sg, :.
It's sixth sense contained In its doI,co,o s,e,
nerves. enables the bat to judge the distance ~
sN' "u!eet Dy the lapse Of time between the send
~ 'ns "'' anu the receiving Of the waves II ia
- 'A''ptiuhal mechanism and not any faculty
ot seeing In the dark which enables tho hat tn
ny uHerringly without the least Upbt ~ o,ido -
rms was proved a hundred wears apo nv ,be am
apalianzani, who made experiments bv hlnftinv
OUT the eyes of bats with red hot irons and found
that tney got along Just as we'll without ewes as
WIN them Other experiments, without cruelty
may De made to show the same thing.
We all knox that If We CAPTURE a wild bird and
hberate 1t in a large room with closed windows,
II makes wild and furious rush for what itg
senses tell II is an opening through which Il can
escape It's eyes do not reveal the presence OF
the glass, and the result is broken neck A
Dat liberated under similar circumstances makes
the same dash for freedom The napping OF its
wings, however, brings its sixth sense into action
and II soon perceires that II is face to face with
a solid wall and stops short before It touches
the glass.
Sir Hiram proposes to apply this sixth sense to
Eea-golng vessels. His apparatus will produce AT.
mospheric vibrations OF about the same frequency
as those produced by the bat but of energy at
least three hundred thousand times as great
These will not be audible, but they will travel
at least twenty miles, SO that they could be re.
ceiyed and recorded by a suitable apparatus at
that distance and would be able to travel at least
five miles and return back to the ship a reflected
echo that would be strong enough to be detected
In describing his invention, Sir Hiram states
that II might be considered an artificial ear The
apparatus is provided with large diaphragm
tightly drawn over a drum-shaped cylinder. and
SO arranged that the atmospheric pressure is al
ways the same on both sides. quite irrespective
of any air blast. II is therefore always able to
yibrate freely In response to the waves OF the
echo, and its vibrations are made to open and
close certain electrical circuits which ring Sc
ries Of bells OF various sizes. II, for example the
object Is very small or at very great distance
from the ship, very small bell rings, while a
large object at distance Of two miles would
ring larger bell and very large object a
still larger bell The apparatus gives an audible
notice II ANYTHING Is ahead Of the ship,
Another apparatus, similar to the first is pro.
yided but instead Of ringing bell It produces
diagram OF the disturbances in the air-that Is
when there Is no noise except that due to the
action of the ship or the sea waves, wavy line
Is produced on paper but whenever the vibrations
sent out by the vibrator strike an object and re.
turn the wavy line on the paper becomes very
much increased In amplitude. so as to be easily
observed and the distance that the object Is from
the shin can be measured by the length OF the
paper strip between the giving on of the vibra.
tions and the receiving OF the echo In this way
the distance Of the object can be determined with
a considerable degree OF accuracy, and the size
OF the object may be determined by the amplitude
of the waves that return.
The apparatus for producing the atmospheric
vibrations should be placed well forward on the
main deek or In any other position where II can