Note 21 — PART I.
Reading edition
In cases where pus has been found in veins surrounded by coagula, its presence and detention there have been differently accounted for. M. Cruveilhier appears to have imagined that the loose coagula act as filters, through which the blood passes, while the pus is retained. (Dict. de Méd. et de Chir. t. xii, p. 641.) The true explanation of the way in which coagula form round pus in the veins has already been given.