Shoshone journal. [volume] (Shoshone, Idaho) 1884-1931, 1913-07-04

The machines for drilling and boring
are the best that money can buy and
the operatives the most skillful to be
found anywhere. Care at this stage
reduces the necessity for Strengthening
later Every point is given the minut-
est attention. In drilling % calibers,
for example, the length of the hole
must be from 100 to 125 times the di-
ameter of the drill
Taking Off 2-1o0o of an Inch.
The boring is an especially delicate
task In chokeboring your shotgun,
for example, the final reamer took off
only 2-1000 of an inch. Think of such
a gossamer thread of metal But it in
sures accuracy.
Looking at Reflected Lines.
But here is the inspection depart
ment. Hanging in the windows are
| translucent frames with a black line
across the center of each. You will
see one of the inspectors take a barrel
from the waiting rack, hold one end
toward the light, squint critically
through the tube and lay it aside APP
proyingly.
You pick it up and follow. his exam
pie First you point it straight at the
black cross line on the frame Then
you tip up the farther end ever so lit
tie and see how two reflected shade
lines form on the shining inner surface
and run down the barrel toward your
eye. These lines are straight as a die;
therefore the barrel is perfect Should
either one waver the slightest fraction
the Inspectors quick eye at once de-
tects it,
There are 240 inspection points and
517 gauges must be used-forty- mine
on the guard, forty-six on the receiver, ]
thirty on the breech block. and so on.
On the receiver for the No. 10 repeat
ing shotgun, however, seventy gauges |
are used, and thirty-one for the trig- |
ger alone.
Beyond the Power of Sight
Some of these gauges are marvels of /
delicacy, but there is one machine used !
which perhaps has never been equaled. /
Not only viii it make measurements /
to one twenty -thousandth of an inch,
but it is actually sensitive to differ
ences of a ONE HUNDRED THOU
SANDTH OF AN INCH. Such a mi
mute dimension we cannot even
imagine 1t is beyond the range of the
most powerful microscope, and yet
here is piece of mechanism which
can really detect it
Testing With Loads.
First, then, is the barrel as perfect as
we believe it? We know that it is
perfect in gauge and workmanship,
but is there the slightest chance of an
invisible Jaw in material? The origi-
nal tests of material made this very,
very unlikely, but we will take no
chances. If there be such flaw it
must burst at more than double the
service charge.
Accordingly the gun is laid in a rest
With its muzzle pointed through an
opening In the wall into a bank of
and We get behind a steel plate fer
afety and put cotton in our ears. The
rigger is pulled by means of string.
3angl The gun is uninjured. Its
uehSlu udS peen assured.
Then follow tests for action and
peed, and if the gun be an auto load
r the swift rattle of its discharges is
The well gagged parts
move as smoothly as the works of a
ratch. And finally there are the tar
ct tests
Firing at Targets.
Rife after rifle In succession is laid
a rest and fred at a mathematically
ivlded target upon the hillside.
The results are noted through tele-
cope Difficulty at this point invaria-
" rejects the rife
Shotguns are discharged at paper tar
cts in the shooting gallery We walk
trough the hallway that runs outside
the point where a boy is handling
lie targets. We hear a distant bang.
he boy pulls handle In the side of
lie wall and frame energies bearing
well .peppered sheet of paper. This
unfastens and hangs up for refer
ice. pinning 4 fresh sheet In its place.
hese targets must all be examined
ID every shot hole be counted. II in
" case there be found less than 10
Y cent of the shot within a circle Of
irty inches from the center the gun
at once rejected.
Here we find, a long way from the
We man. thousands Of skilled me
anics producing arms and ammuni-
N very different from the thrown
ssile Of the stone age. And the part
'yed IN the wars of the earth has
zen way largely to the serving Of
aceful hunters and marksmen.