. Anthropology. rdinary horizontal pro-jections of the head, the face and the anterior and posterior cranium. Under aU circumstances the process is the same, namely, thatof the double square; the methods alone vary, and are doneimpromptu. Two squares, graduated in centimetres and milli-metres, are essential: the larger consists of two pieces, one ofwhich is graduated ; the other, being heavy, rests in equilibrium on,the table: the smaller is the common one. Chap, hi.] THE CRANIOPHORB. 273 Suppose we want to take the height of a point with relation tothe alveolo-condylean plane. The skull being
. Anthropology. rdinary horizontal pro-jections of the head, the face and the anterior and posterior cranium. Under aU circumstances the process is the same, namely, thatof the double square; the methods alone vary, and are doneimpromptu. Two squares, graduated in centimetres and milli-metres, are essential: the larger consists of two pieces, one ofwhich is graduated ; the other, being heavy, rests in equilibrium on,the table: the smaller is the common one. Chap, hi.] THE CRANIOPHORB. 273 Suppose we want to take the height of a point with relation tothe alveolo-condylean plane. The skull being placed on this planein its natural position, the larger square is put upright on the planeclose to the point required. On its vertical portion, graduated sothat zero corresponds to the alveolo-condylean plane, we slide at aright angle the second square, until the sloping side of its pointtouches the point in question. We have then only to read off theheight required. But without moving, the same operation gives. Pig, 33.—Topinards Craniophore. A, Pedestal; B, Shelf; 0, Sliding piece and steelblade; D, Small square. The other is the large square. The apparatus is in positionfor measuring the height of the supra-orbital point, and its horizontal projectionbehind the alveolar point. the horizontal projection of the same point witJi relation to anyother spot that we desire at the periphery of the skull. Thevertical portion being placed upright, for example, in contact withthe alveolar border, the distance indicated on the smaller squarefrom the supra-orbital point to this vertical portion, will be thehorizontal projection of that point with relation to the alveolarpoint. Such is the object of the craniophore, of our own invention, andwhich is now in common use. It consists of two pieces—a pedestal - -? . •? T 274 THE GENERAL INDEX OF THE HEAD. [Chap, ihl and a shelf—the two, when adjusted, being exactly 10 centimfetres-in height; the sheH sliding in a groove, so as to allo
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