Fig. 1. A bolster made in the form of a wedge, intended to be placed
between the arm and the side of the thorax.
_a._ Its base, which should fit the hollow of the arm-pit.
_b._ Its summit reversed, against which the elbow is to be applied.
Fig. 2. The first roller applied for the purpose of fixing the
bolster against the side of the thorax.
_a a._ Oblique casts before, passing over the opposite shoulder, in
order to hold it up.
_b._ Oblique casts from behind, crossing the first ones on the
shoulder.
_d d._ Circular casts round the trunk, covering the bolster, which
they fix laterally.
Fig. 3. The second roller, applied to fix the arm against the bolster.
_a & b._ Portions of the oblique casts of the first roller, left
uncovered by this one.
_c c._ Turns of the second roller, covering those of the first,
loose above, and tighter below, for the purpose of drawing the
superior extremity of the humerus outwards.
_d._ Their passage over the side opposite to the bolster.
Fig. 4. The third roller intended to keep the point of the shoulder
raised.
_a a & b._ Oblique casts of the first roller, remaining uncovered.
_c c._ Turns of the second, seen through the opening of those of
the third.
_d._ Oblique casts of the third, ascending from the arm-pit over the
shoulder of the diseased side, to descend again behind, along
the arm, and pass under the elbow.
_f k._ A continuation of the preceding casts, reascending under the
sound arm-pit, and from thence behind the thorax, over the
diseased shoulder.
_e._ A continuation of the same casts, descending on the fore side of
the arm, passing under the elbow, and ascending again under the
arm-pit of the sound side.
_g._ The remainder of the roller, intended to be employed in circular
turns, in order to secure the casts _e_, and prevent them from
slipping outward.
Fig. 5. A sling which should be fastened to the oblique cast _d_
(Fig. 4), to support the hand.
[Illustration: _Pl. 1_
_Fig. 1._
_Fig. 2._
_Fig. 3._
_Fig. 5._
_Fig. 4._
_Engrav'd by W. Kneafs._]