292 



Presents. 



[June 7, 



(2) — are not obviated by section of all the visible branches of the 

 annulus of Yienssens, and of the vago- sympathetic in the neck and 

 thorax. They appear to depend on properties of the heart itself, and 

 not on the influence of extra-cardiac nerves. 



DESCRIPTION OF FIG-URES. 



Fig-. 1. — Tracing of auricles and ventricles, showing effects of clamping descending 

 aorta (Ao.). In the ventricular tracing the upward movement indicates con- 

 traction; in the auricular tracing the downward movement indicates con- 

 traction. The time tracing shows half seconds. 



Fig. 2. — Tracing of auricles. Downward movement indicates contraction. Descend- 

 ing aorta clamped at the point marked I, and released at f . Time marker 

 indicates half seconds. 



FiG. 3. — Tracing of auricles and ventricles. In the ventricular tracing contraction 

 is represented by the upward movement, in the auricular tracing by the 

 downward movement. Time marker shows half seconds. Clamping of 

 descending aorta. 



Fig. 4. — Tracing of ventricles ; upward movement indicates contraction. Increase 

 in size of beats during the closure of the descending aorta. Time marker 

 indicates half seconds. 



Fig. 5. — Tracings of auricles, ventricles and blood-pressure in left carotid artery. 

 The lowest tracing marks the time in half seconds. The level of the ventri- 

 cular tracing rises during closure of the descending aorta ; there is incom- 

 plete emptying of the left ventricle at each systole. 



• Presents, June 7, 1888. 



Transactions. 



Geneva : — Societe de Physique et d'Histoire Naturelle. Memoires. 



Tome XXIX. Partie 2. 4to. Geneve 1886-87. The Society. 

 Leipzig : — Astronomische Gesellschaft. Yierteljahrsschrift. Jahrg. 



XX. Heft 4. 8vo. Leipzig 1887. The Society. 



London : — Anthropological Institute. Journal. Yol. XVII. No. 4. 

 8vo. London 1888. The Institute. 



East India Association. Journal. Vol. XX. No. 2. 8vo. 



8vo. London 1888. The Association. 



Institution of Civil Engineers. Minutes of Proceedings. Vol. 



XCII. 8vo. London 1888. The Institution. 



Odontological Society of Great Britain. Transactions. Vol. XX. 



No. 7. 8vo. London 1888. * The Society. 



Royal United Service Institution. Journal. Vol. XXXII. No. 



143. 8vo. London 1888. The Institution. 



Victoria Institute. Journal of Transactions. Vol. XXL No. 84. 

 8vo. London 1888. The Institute. 



Mexico : — Sociedad Cientifica "Antonio Alzate." Memorias. 

 Tomo 1. Num. 9. 8vo. Mexico 1888. The Society. 



