64 



tiou than those near the centre. In approaching the 

 centre they retained their actual velocity, and conse- 

 quently increased in angular velocity, and, in escaping at 

 the central orifice, produced a vortex in the direction of 

 the earth's rotation, affording another experimental proof 

 that such rotation existed. 



FIFTH ORDINARY MEETING. 



Royal Institution, 14th December, 1857. 



The Rev. H. H. HIGGINS, M.A., V.P., in the Chair. 



Robert TornAM Steele, Esq. was elected an Ordinary 

 Member. 



The resignation of Mr. C. Millward Avas accepted. 



The death of Mr. S. T. Winstanley was communicated. 



Mr. A. HiGGiNSON submitted portions of the skeleton 

 of a shark, and explained its anatomy. 



Mr. T. C. AEcnER exhibited a series of English lichens, 

 prepared by Dr. W. L. Lindsay, together with fabrics 

 dyed by them. 



Mr. WhitehExID exhibited portions of the wooden keel 

 of a vessel extensively destroyed by the teredo uavalis, 

 also specimens of the worm. 



The paper of the evening was then read " On the 

 Smelting and Assaying of Tin Ores, &c.," by Newton 

 Samuelson, Esq., F.C.S. 



