. Medical communications of the Massachusetts Medical Society . aris before being cut. The vertebras, as I have said, are to be imbedded in sandor putty, and first of all we need some general plan accordingto which to place them. This is given by It doesnot pretend to be absolutely correct, but it is a good workingmodel. It is made as follows :—Draw a vertical line ofabout the length one would suppose a line a b to have,passing from the top of the atlas to the top of the the plan adjoining this description I will call this line 12c. m. Divide this line into quarters, and call
. Medical communications of the Massachusetts Medical Society . aris before being cut. The vertebras, as I have said, are to be imbedded in sandor putty, and first of all we need some general plan accordingto which to place them. This is given by It doesnot pretend to be absolutely correct, but it is a good workingmodel. It is made as follows :—Draw a vertical line ofabout the length one would suppose a line a b to have,passing from the top of the atlas to the top of the the plan adjoining this description I will call this line 12c. m. Divide this line into quarters, and call each quarterone unit of length. At the junction c of the two lowerquarters erect a perpendicular c d running backward forthe length of one half a unit. From d draw two lines d eand d f, each one unit in length, and each forming an angleof 22J° with c d. Unite e and f by an arc of 45° of a 1 Ueber die Normale Krttmnuing der Wirbelsaule von Freidrich Horner,Med. Dr. (Mit einer Nachschrift von Prof. Hermann Meyer in Zurich). Mid-lers Archiv. 1854. FIGURE HUMAN SKELETON. 209 circle, the centre of which is at d. Draw a straight line eg,one unit in length, from e to the original vertical. From gdraw the line g h 1\ units in length, and inclosing with a gan angle of 70°. From h as a centre draw the arc g i of40°. Unite h and i and prolong this line for one unit, tok. From 1c as a centre, draw an arc of 40° from a to make the pelvic portion, draw the line b I, % of a unit, atan angle of 45° with a b, and with a radius of this lengthdraw an arc b m of 90°. Then unite m and f. This may appear complicated, but if the directions arefollowed step by step it is perfectly simple. The line issupposed to represent the front of the column. It is im-portant to notice that i is at the lower border of the 6thcervical, g at the upper border of the 9th dorsal, e at thelower border of the 2d lumbar, and m at the middle of the3d sacral vertebra. The curve is essentially that of theup
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmedicine, bookyear187
