CONTENTS 



Page. 

 Proceedings of the Meeting ix 



TRANSACTIONS. 



Report on the State of Knowledge respecting Mineral Veins. By 

 John Taylor, F.R.S., Treasurer of the Geological Society and 

 of the British Association for the Advancement of Science, &c. 1 



On the Principal Questions at present debated in the Philosophy 

 of Botany. By John Lindley, Ph. D., F.R.S., Professor of 

 Botany in the University of London 27 



Report on the Physiology of the Nervous System. By William 

 Charles Henry, M.D., Physician to the Manchester Royal In- 

 firmary .59 



Report on the present State of our Knowledge respecting the 

 Strength of Materials. By Peter Barlow, F.R.S., Corr. Memb. 

 Inst. France, &c. &c 93 



Report on the State of our Knowledge respecting the Magnetism 

 of the Earth. By S. Hunter Christie, M.A., F.R.S., M.C.P.S., 

 Corr. Memb. Philom. Soc. Paris, Hon. Memb. Yorkshire Phil. 

 Soc. ; of the Royal Military Academy ; and Member of Trinity 

 College Cambridge 105 



Report on the present State of the Analytical Theory of Hydro- 

 statics and Hydrodynamics. By the Rev. J. Challis, late Fel- 

 low of Trinity College Cambridge 131 



Report on the Progress and present State of our Knowledge of 

 Hydraulics as a Branch of Engineering. By George Rennie, 

 F.R.S., &c. &c 153 



Report on the recent Progress and present State of certain Branches 

 of Analysis. By George Peacock, M.A., F.R.S., F.G.S., 

 F.Z.S., F.R.A.S., F.C.P.S., FeUow and Tutor of Trinity Col- 

 lege Cambridge 185 



TRANSACTIONS OF THE SECTIONS. 

 I. Mathematics and Physics. 



Professor CErsted on the Compressibility of Water 353 



W. R. Hamilton on some Results of the View of a Characteristic 



Function in Optics 360 



The Rev. H. Lloyd on Conical Refraction 370 



