CHAPTER II. 
two precedes, which join the os frontis, and make part of the nofe, and 
another, which joins to the cartilage of the feptum nafi. Its upper and 
outward parts make the lower parts of the orbits of the eyes; its lower 
hue, all that pait of the face under the cheeks, eyes, and nofe to the 
mouth, and two thirds ol the roof of the mouth. A little below the orbits 
n, the eycs, in this bone, are two holes, and behind the dentes inciforcs one 
more, which divides into two, as it opens into the nofe, on each fide the 
feptum nafi. Between the poflerior grinding-teeth and the orbits of the 
eyes are two great finufes, called antra maxilla: fuperioris, which open in¬ 
to the upper part of the nofe. And in the lower edge of this jaw are the 
alveoli, or lockets for the teeth. Part of the Tides of thefe cavities, that 
lie next the nofe, are only membranes which make the cavities like drums, 
perhaps to give a grave found to the voice when we let part of it through 
the nofe; but brutes not needing fuch variety of founds, have thefe cavi¬ 
ties open to the nole, and filled with lamellae, which are covered with 
membranes, in which the ol fa£tory nerves terminate, for a more exquifite 
lenie of fmelling than is necefiary for men. Impoflhumationsfometimes 
happen in thcle cavities: The figns of this difeafe are great pain about the 
part, matter in the nofe on the fide difealcd, {linking breath and rotten 
teeth. Mr. Cowper firfl deferibed this calc, and the cure; which is per¬ 
formed by drawing out the lafl tooth but one, or two, or more, if rotten; 
and through their lockets making a perforation into the antrum; or if 
drawing a tooth makes a perforation, which fometimes happens, and 
perhaps gave the firfl hint of this cure, then that opening mull be enlar¬ 
ged, if it is not fufficient to difeharge the matter. 
Ofla palati, (Tab. v. vii. viii.) are two {mall bones that make the back 
part of the roof of the mouth, and a fmall part of the bottom of each or¬ 
bit. Between the ofla palati and os maxillare near the pterygoid procefles 
of the iphenoidal bone, are two lmall foramina, through which arteries 
and nerves pafs to the palate. 
Os vomer, (Tab. v. vii. viii.) is feated between the bones of the palate, 
and the Iphenoidal bone. It is alfo joined to the procefs of the ethmoidcs, 
and part of the lower jaw. Its fore-part is fpongy, and is continued to the 
middle cartilage of the nofe. This bone atid cartilage are the feptum 
nafi. 
Os fpongioflim, (Tab. viii.) is ufually treated as a diftin£t bone, though 
it is only the ipongy lamina: in the nofe, of the os ethmoidcs and ofla pla¬ 
na, but chiefly of the os ethmoidcs, to which it always adheres. In confi- 
dcring thefe lamella: as a diflinit bone, we follow the antients, who did 
