Celestial Phenomena from July 1. to Oct. 1. 1827. 181 



Proceedings of the Wernerian Natural History Society. 

 (Continued from the preceding vol. p. 391.) 



1827, Feb. 24. — Professor Jameson, P. in the chair. — The 

 Secretary read a communication from Mr David Don, on the 

 species of Rheum which affords the rhubarb of commerce. This 

 has been ascertained to be the Rheum Emodi of Dr Roxburgh, 

 — the R. australe of the Flora Napalensis. (See preceding vo- 

 lume of this Journal, p. 304.) 



Mr John James Audubon of Louisiana, being present, read 

 an account of the natural history of the Rattlesnake, (Crotalus 

 horridus), illustrated by a very beautiful drawing of the animal 

 suffering the attacks of mocking-birds. — [This interesting pa- 

 per is printed in the present Number of this Journal, p. 21 j 

 et seq.~\ 



