ither sighted along the _left_ of the rear sight notch or
the _right_ side of the front sight, or has committed both of these
errors.

If the bull's-eye is to the _left_ of its proper place, the soldier
has probably-sighted along the _right_ of the rear sight notch, or to
the _left_ of the front sight, or has committed both of these errors.

If the bull's eye is diagonally above and to the right, the soldier
has probably combined the errors which placed it too high and too far
to the right.

Any other diagonal position would be produced by a similar combination
of vertical and horizontal errors.

After the above instruction has been given to one man, the line of
sight will be slightly changed by moving the sighting rest or by
changing the elevation and windage, and the exercises similarly
repeated with other men.

Repeat the exercise, using the _peep_ sight.

Third Sighting Exercise

=1362.= This exercise shows the effect of canting the piece.

It is most important that in aiming the sights be kept vertical and
the piece not be canted,--that is, that the barrel be not tilted over
to the right or left.

If the piece is canted to the right, the sights are lowered to the
right and consequently the bullet will strike to the right and below
the point aimed at, even though the rifle be otherwise correctly aimed
and the sights correctly set.

Similarly if the piece is canted to the left the sights are lowered to
the left, and consequently the bullet will strike to the left and low.

This effect of canting the piece may be shown as follows: Use the
sighting rest with the rifle firmly held in the notches, the bolt
removed.

Paste a black paster near the center of the bottom line of the target.
Sight the rifle on this mark, using about 2000 yards' elevation. Then,
being careful not to move the rifle, look through the bore and direct
the marker to move the disk until the bull's-eye is in the center of
the field of view and command, "Mark."

Next, turn the rest (with the rifle) over 90 deg. to the right, on its
side, and with the same elevation, sight on the same paster as above.
Then, being careful not to move the rifle, look through the bore and
again direct the marker to move the disk until the bull's-eye is in
the center of the field of view and command, "Mark."

Not considering the fall of the bullet, the first mark represents the
point struck with the sight vertical, the second mark represents the
point s