rnal circumflex
beneath the rectus muscle, inosculate with the muscular branches of the
anastomotica magna springing from the lower third of the main vessel;
the three perforating branches of the profunda inosculate with the
latter vessel, with the sciatic, and with the articular and muscular
branches around the knee-joint.

XXIII.--The popliteal artery. When any circumstance renders it necessary
to tie this vessel in preference to the femoral, the ligature should be
placed above its upper pair of articular branches; for by so doing a
freer collateral circulation will take place in reference to the leg.
The ligature in this situation will lie between the anastomotic and
articular arteries, which freely communicate with each other.

XXIV.--The anterior and posterior tibial and peronoeal arteries. As
these vessels correspond to the arteries of the forearm, the
observations which apply to the one set apply also to the other.
[Footnote]

[Footnote: For a complete history of the general vascular system, see
The Anatomy of the Arteries of the Human Body, by Richard Quain, F.R.S.,
&c., in which work, besides the results of the author's own great
experience and original observations, will be found those of Haller's,
Scarpa's, Tiedemann's, &c., systematically arranged with a view to
operative surgery.]

THE END.

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