472 PHILOSOPHICAL TRANSACTIONS. [aNNO 1700. 



consider lliat the os frontis of a man is of so peculiar a make from the globose 

 shape of the head, that no bone among all the animals of the creation bears any 

 resemblance to its figure, excepting that of a monkey, but all this genus is of 

 a much smaller size than a man. In order rightly to understand and to form 

 a clear conception, both of the agreement in shape and of the remarkable dif- 

 ference in size between this great os frontis and the same bone in a man of 

 ordinary stature, and the better to apprehend what deductions may be made 

 from hence, to determine the true height of the person to whom it formerly 

 belonged, we must have recourse to the figures. Of these, fig. 15, pi. !0 

 shows the common shape and size of an os frontis, or forehead bone of a man 

 of an ordinary stature, convex or outside forwards; abcde is the line the coronal 

 suture makes with its indentures, surrounding the upper edge of the bone, and 

 by which it is joined to both the ossa bregmatis or verticis ; e the place where 

 the coronal and sagittal sutures meet; f the part to which the bones of the nose 

 are fastened ; gg the upper part of the orbits of the eyes ; hh the holes in the 

 bone over the eyes, which give passage to the two large branches of nerves that 

 supply the frontal muscle, and those of the eye-brows ; ii the two processes, or 

 protuberances, that join with the first bone of the upper javv, which by some 

 accident were broken off the large bone, and therefore are not expressed in the 

 following figure. 



The measure round the ambit of the coronal suture, from a to g, was 10-V 

 inches, in this bone from c, where the coronal and sagittal sutures meet to f 

 where the bones of the nose are fastened, 4-i- inches ; from b drawing a trans- 

 verse line across the forehead to d, 6 inches ; the thickness of the bone about 

 a quarter of an inch. 



Fig. ]6 represents the gigantic forehead-bone, in the same posture with the 

 former, and drawn exactly to the same proportion. 



Here we may remark, not only its extraordinary magnitude in comparison 

 with the foregoing figure, but also its natural and true proportions, every way 

 agreeable to its large dimensions, that is, as to its circumference, height, 

 breadth, and thickness, in all which respects it bears, to the greatest exactness, 

 a conformity to the symmetry or common rules of nature. 



abcde is the coronal suture, in some place a little worn and defaced ; c the 

 place where the coronal and sagittal sutures meet ; fthe part where the bones of 

 the nose were fastened ; gg the upper part of the orbits of the eyes; hh the 

 two holes for the nerves that pass into the muscles of the eye-brows and the 

 frontal nmsde. 



The measure round the ambit of the coronal suture in this bone, from a to e, 

 was about 21 inches; from c where the sagittal and coronal sutures meet, to f. 



