1880.] Experimental Researches : Heart of the Frog. 373 



May 13, 1880. 



THE PRESIDENT in the Chair. 



The Presents received were laid on the table and thanks ordered for 

 them. 



In pursuance of the Statutes, the names of the Candidates recom- 

 mended for election into the Society were read from the Chair, as 

 follows : — 



Allbutt, Thomas Clifford, M.A., 



M.D., F.L.S. 

 Attfield, Prof. John, Ph.D., F.C.S. 

 Blanford, Henry Francis, F.G.S. 

 Dallinger, Rev. William Henry. 

 Dyer, William Turner Thiselton, 



M.A., F.L.S. 

 Godwin- Austen, Lieut.-Col. Henry 



Haver sham. 

 'Graves, The Right Rev. Charles, 



D.D., Bishop of Limerick. 



Hughes, Prof. David Edward. 

 Jeffery, Henry M., M.A. 

 M'Coy, Prof. Frederick, F.G.S. 

 Moulton, J. Fletcher, M.A. 

 Mven, Prof. Charles, M.A. 



F.R.A.S. 

 Rae, John, LL.D. 

 Reynolds, Prof. J. Emerson, 



M.D. 



Tilden, William A., D.Sc. 



The following Papers were read : — 



I. " Notice of further Experimental Researches on the Time- 

 relations of the Excitatory Process in the Ventricle of the 

 Heart of the Frog." By J. Burdon-Sanderson, M.D., 

 LL.D., F.R.S., Jodrell Professor of Physiology, University 

 College, and F. J. M. Page, B.Sc, F.C.S. Received March 

 31, 1880. 



In a previous paper ("Proceedings," vol. xxvii, p. 410) we com- 

 municated experimental results relating to the phenomena which 

 present themselves in the ventricle of the heart of the frog, when 

 mechanically or electrically excited. Our present purpose is to report 

 what has been done during the past winter towards the further eluci- 

 dation of the subject. 



By the term " excitatory state " we mean, as in our former com- 

 munication, nothing more than the condition which is produced in 

 any excitable structure (whether in plants or animals) by excita- 

 tion. So far as it has been as yet investigated, this state is charac- 

 terised (1) by the appearance of electromotive properties in the 

 ■excited part, which did not exist before excitation, and cease to 



vol. xxx. 2 E 



