[388] Pulmonary vein, or rather, left auricle. Galen means a reflux through the mitral orifice; the left auricle was looked on rather as the termination of the pulmonary veins than as a part of the heart. _cf._ p. 323, note 4 (403). He speaks here of a kind of "physiological" mitral incompetence. [389] _Horror vacui._ [390] _cf._ p. 305, note 2 (377). [391] _cf._ p. 308, note 1 (381). [392] The "mechanical" principle of _horror vacui_ contrasted with the "physical" or semi-physiological principle of specific attraction. _Appropriateness_ here might almost be rendered _affinity_ or _kinship_. _cf_. note 2 (393), _infra_. [393] "Related," "akin." _cf._ p. 36, note 2 (61). [394] The coats exercise the _vital_ traction, the cavities the merely _mechanical_. _cf_. p. 165, note 2 (232). [395] Chap. xiv. [396] These fossae were probably the recesses between the _columnae carnae_. [397] On _logos_ _cf._ p. 226, note 2 (305). [398] He means the tricuspid orifice. _cf._ p. 121, note 4 (177). [399] The right auricle was looked on less as a part of the heart than as an expansion or "insertion" of the vena cava. [400] This "vein" (really the pulmonary artery) was supposed to be the channel by which the lungs received nutriment from the right heart. _cf._ p. 121, note 3 (176). [401] The coronary vein. [402] Galen's conclusion, of course, is, so far, correct, but he has substituted an imaginary direct communication between the ventricles for the actual and more roundabout pulmonary circulation, of whose existence he apparently had no idea. His views were eventually corrected by the Renascence anatomists. _cf._ Introduction, pp. xxii.-xxiii. [403] He means the left auricle, considered as the termination of the pulmonary "arteries"; _cf._ p. 314, note 3 (388). [404] The aorta, its orifice being circular, appears bigger than the slit-like mitral orifice. [405] p. 87. [406] Or we may render it "corpuscle"; Galen practically means the _cell_. _cf._ p. 153, note 2 (216). [407] _cf._ the term "cavernous tissue." [408] I. x. [409] Lit. _homoeomerous_, _i.e._ "the same all through," of similar structure throughout, the _elements_ of living matter, _cf._ p. 20, note 3 (38), and _cf._ also the "cell" of Erasistratus, p. 153. [410] "Delivered," "dispersed"; _cf._ p. 13, note 5 (26). INDEX AND GLOSSARY (The numbers refer to the pages of the present edition; fuller references will be found in the footnotes.) Abortifacient drugs, 285 Abortion, 231, 285 Absorption from digestive tract (_v. Anadosis_) Acidity of urine, 245, 287 Activity (function), 13 Adhesion (prosphysis) of nutriment to tissues, 39 Affinity, 33 Alimentary canal, 119, 309 coats of, 23, 263 Allopathic treatment, 199