Note 4 — PATHOLOGICAL ESSAYS ON SOME DISEASES OF THE HEART;
Reading edition
Opacity and thickening of the lining membrane on both sides of the heart, without unevenness or alteration of form. (St. B. 33).
Opacity and thickening in the valvular apparatus between the left auricle and ventricle, with shortening of the chordæ tendinæ, and such alteration of structure and form as to produce a considerable contraction of the aperture. (St. B. 26).
Such thickening of the whole valvular apparatus as to narrow the aperture of communication between the left auricle and ventricle to a mere slit. (St. B. 19).
Shrivelled and contracted state of the semilunar valves, in which a cartilaginous substance has entirely taken the place of the natural structure. (Hodgson, pl. 1, fig. 6).