325 



The following Donations to the Library were announced : 



Some Account of the last Yellow Fever Epidemic of British Guiana. 

 By Daniel Blair, M.D. Edited by John Davy, M.D., F.R.S.L. &E. 

 8vo. — By the Author, 



Pas peripherische Nervensystem der Fische, Anatoniisch und Phy- 

 siologisch untersucht von Dr Hermann Stannius. 4to. — By the 

 Author. 



Noue Denkschriften der Allg. Schweizerischen Gcsellschaft fiir die 

 gesammten naturwissenschaften. Bd. x., mit. xiii. Tafeln. 4to. 

 — By the Society. 



On the Diffusion of Liquids. By Thomas Graham, Esq., F.R.S., 

 F.C.P. 4to. — By the Author. 



Description of the Instruments and Process used in the Photogra- 

 phic Self registration of the Magnetical and Meteorological In- 

 struments at the Royal Observatory, Greenwich. 4to. — By the 

 Astronomer-Royal. 



Proceedings of the Royal Astronomical Society. Vol. X., No. 4. 

 8vo. — By the Society. 



Description of tlie Observatory at Cambridge, Massachusetts. By 

 William Cranch Bond. 4to. 



Astronomical Observations made at Cambridge Observatory, Massa- 

 chusetts, 1847-8. 8vo. — By the Observatory. 



Monday, 1st April, 1850. 



Gen. Sir T. MAKDOUGALL BRISBANE, Bart., in 

 the Chair. 



4. On a Peruvian Musical Instrument, like the ancient 

 Syrinx. By Dr Traill. 



The author prefaced his description of the instrument, by a few 

 general remarks on the communication, in very remote epochs, be- 

 tween the inhabitants of the old and new worlds, as deducible from 

 affinities in their traditions, their cosmogenies, their religious rites 

 and structures, their astronomical cycles, and their determination of 

 the length of the year. 



