6 © BOTANIC PHYSICIAN. 
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eavities, in which are two depressions for the situation of the tear ~_ 
: oe; a notch in each eye-brow ridge for the cartilaginous pulley — 
of the upper oblique muscle ; an eye-brow hole through which passes * 
the forehead artery and nerve; the blind hole, situated below the — 
beginning of the interna) forehead spine.. , 
6 > forehead bone is joied to those two forming the sides of the 
head by the crown suture; with the two bones of the nose, the two 
upper jaw bones, and the two tear bones, by what is called the trans- 
‘verse suture ; with the wedge bone and sieve bone, by harmony 0 
_ their parts; and with the cheek bone, by suture. - : 
The use of the forehead bone is to form the forehead pituitary 
canals, part of the orbits, and to contain and defend the lobes of 
the brain. _ > 
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= Se cnc om. 
"hese bones, forming the sides of the skull, are placed, one on 
what four-sided. There isa semi-circular ridge from which the tem- 
ple muscle originates; and a hole near the arrow suture, which 
_ transmits ap artery and a vein of the outer membrane of the brain. 
‘Upon its internal surface are the grooves of the spinous artery ; and 
ee e the two bones are united there is a deep cavity extending along 
e arrow suture, for the longitudinal canal of the outer membrane. 
These bones are the most equal and smooth, and are among the 
- thinnest bones of the skull, ‘Their use is to form the superior part 
of the head. 
— 
the bop 
great cavity on the back of 
ow proceeds into the 
wards into the brain ; 
