f >?o 
Protuberance, whence in its defeent the Bone became deprefs’d j 
and now the Sinus is conipicuous (i) being fram’d by an obtule 
Spina, defeending obliquely forward from the fore (ad rugofity 
on the one fide, and another obtufe Spina deicendmg obliquely 
outward on the other. This Sinus (;) is 4 Inches b: oad from be- 
fore to behind; thence meafuring backward the Bone is flat : l 
Inches; meafuring from thence on the infide, the Bone having 
form d an obtufe Angle, is 5 7 Inches flat alfo. The Spina on the 
fore fide, after it has defeended 5 i Inches, the Bone becomes flat • 
that on the outfide terminating in a confiderable ..Protuberance, 
4 f Inches long, where the Bone has only two Faces, convex be- 
fore and concave behind, and i 7 Inches round. Behind its fore- 
faid outwardProtuberance is 7 Inches; it becomes 1 \ Inches de- 
prefs’d in the middle, where the Sir, us for receiving the Cu- 
bitus begins. From the forefaid external Protuberance ; t defeends 
in a ftreight Line 8 Inches, and from its oppofitc pa:t at the in- 
fide it defeends obliquely backw rds 5 Inches-, and here the i < wer 
Epiphyfis begins, where ’tis receiv’d by the Cubitus and *adwt. 
This Epiphyfis is 1 Foot 10 Inches round being Inches thiek at 
the outfide and flat, and 7 Inches at the infide and Protuberant; 
betwixt which behind is a confiderable inns , Inches broad* 
and 2; Inches deep, and before, another Smus 7 nches broadj 
of the fame deepnefs. This Epiphyfis is at its lower extremity 
and infide, where it receives the Cubitus , 5 ■ Inches fiom before 
to behind; of a convex Surface and 6 Inches at its outfide, where 
Vis receiv’d by the Radius. At its tore part the Sinus is not 
very confiderable, but at its back part deeper and arrower for 
receiving the Olecranon. Ar the extremity of the Epi byfit, ’tis 
narrower, being only 6 Inches from the right to the left before 
and 7 ~ Inches behind. And thus you have an Account of the moffc 
irregular Bone of the Body, being at it»s external part «o Inches 
in length, and 26 at its internal* having a large Head confid- 
ing of an Epiphyfis. receiv’d by the Scapula , a large Protuberance 
on the outfide defending it from Difloca'tion, and a Sinus be- 
twixt the two reaching a good way back, thence defeendin* to 
its Neck, whence the Bone becomes flat (2) to about the mid- 
dle, defeending on the outfide, flat alfo, with two rugofities for 
the Infertion of the Tendons. Betwixt this outfide and back parr 
is a very large Sinus for the Biceps, which oblique fituation 
is an admirable contrivance for adding Strength and conciliating 
kngth to this Mufcle. Now the fhape of the Bone begins to be 
- chang d, 
