NOTE ON THE CONFIGURATION OF THE HEART. 



gl 



In each case I measured the greatest transverse and antero- 

 posterior diameters. I afterwards excised the hearts and further 

 examined them in order to see whether they were diseased 

 or healthy, and of the average size and weight. I also noted 

 the sex and age of the subject from which each was taken. 



EXPLANATION OF PLATES IV. TO VI. 



Plate IV. 



Two drawings of a human heart which was hardened in situ with 

 formalin. 



Fig. 



A. — From the ria;ht side : — 



^.*S'. = anterior surface. 

 7n.a. = margo acutus. 

 R.B. = right herder of right auricle. 

 a. = apex of ventricles. 



Fig. B. — From below and behind : — 



/.aS. = inferior or basal surface. 



L.a. = left auricle (posterior aspect). 



R.a. = right „ 



/. G. = inferior cava. 



S. C. = superior „ 

 L.P.v. = left pulmonary veins. 

 R.P.v. = v{g\ii 



m.a. = margo acutus. 



m.o. = margo obtusus. 

 P.B. = posterior border. 

 R.B. = right border. 



1 



] On the 



[ posterior 

 r surface of 



heart. 



J 



Plate V. 



Drawing from a tracing of the human heart taken in situ after 

 opening the pericardium from the front with a crucial incision. 



This illustration is made from the heart of an ordinary dissecting- 

 room subject, not hardened with formalin. 



m.a. = mar^o acutus. 

 m.o. = margo obtusus. 

 R.B. = right border. 

 a. = apex. 



VOL, XXXV. (N.S. VOL. XV.) — OCT. 1900. F 



