to The Anatomy of a HOKS'E. Chap. VI. 



might not run through the whole Skull, but be ftop'd at the 

 end of the fraclured Bone ; whereas if it was not for thefe 

 Seams, it might with one Blow be fliivered all in Pieces 

 Eke an earthen Pot. But I fhall now return to the Bones. 

 The Fro?ital or Forehead Bone, which I 

 ^e Frenfal i^^lvg already taken Notice of as the firft pro- 



cZlus kz' ^^^ ^°"^ °^ the Skull, is feated before, and 

 " * ' ■ makes the fore-part of the Skull. It is bound- 

 ed on its fore-part by the Coronal and firll common Suture, 

 on the Sides by the Temporal Bones, and on its infide by 

 the OJfii Spongiofa^ or fpongy Bones. Between its Lamina 

 or Plates, there is a double Cavity, from whence there is 

 alfo a double Paflage into the Nofttils, diftinguifhed by 

 many bony Fibres, and fmall Scales, which are encompafTed 

 •with a green Membrane, and contain a foft, medullar, or 

 rather oily Sabftance. Thefe are proportionably larger in 

 a Horfc than in a Man, and have various Ufcs afcribed to 

 them, being thought by fome to aflift in the Office of 

 Smelling, by intangling the odoriferous Air ; by fome, to 

 promote the Shrilnefs of the Voice ; and by others, to be 

 a Receptacle for fome Portion of the excrementitious 

 Matter, which is feparated from thofe Parts. 



Befides thefe Cavities, there is a Sinus or Den on each 

 Side, called the Frotital Sinus's^ compos'd of a double Scale ; 

 one making the upper Part of the Orbit of the Eye, and 

 the other forming the Cavity above the "Eyes, on either 

 Side, which is not very plain, having only Infcriptions an- 

 fwerable to the winding Convolutions of the Brain. This 

 Bone has alfo two Holes, which go to the Orbit of the 

 Eye, whereby the firlt Branch of the Nerve of the fifth 

 Conjugation goeth to the Mufcles of the Forehead. It has 

 likewife four Procelles, two of which are feated at the 

 greater Corner of the Eye, and the other two at its lefl'er 

 Corner, helping to form tlie upper Part of the Orbit. 

 7/j S' ciD t '^"^^ Bones of the Sinciput are next to the 



* Frontal, being joined to it by the Coronal 

 Suture, and behind to the Occipital Bone by the La?nbdoi- 

 cal Suture, on each Side, to the Temple-Bones, by ihtSu- 

 tiircs Squammofce^ or fcaly Sutures, and by one of the com- 

 mon Sutures to the Wedge-like Bone. They are alfo join- 

 ed one to the other, by the Sagittal, or Arrow like Suture, 

 Their Figure is fomewhat fquare, and though their Sub- 

 ftance is thinner than that of the other Bones of the Skull, 

 yet they are alfo made up of two Lamina^ excepting where 



lhc7 



