CONTENTS. VU 



Page 



Interim Report of tlie Committee on the Laws of the Flow and Action 

 of "Water containing Solid Matter in Suspension, consisting of T. 

 Hawkslet, Prof. E.v.nkine, F.R.S., R. B. Gfi-iNTHAM, Sir A. S. Watjgh, 

 F.R.S., and T. Login 402 



Interim Report by the Committee on Agricultural Machinery, consisting 

 of the Duke of Btjccleuch, F.R.S., The Rev. Patetck Bell, David 

 Geeig, J. Oldham, William Smith, C.E., Hakold Littledale, The 

 Earl of Caithness, F.R.S., Robert Neilson, Prof. Rankine, F.R.S., 

 F. J. Bramwell, Rev. Prof. Willis, F.R.S., and Charles Manbt, 

 F.R.S. ; P. Le Neve Foster and J. P. Smith, Secretaries 404 



Report on the Physiological Action of the Methyl and Allied Series. 

 By Benjamin W. Richardson, M.A., M.D., F.R.S 405 



On the Influence of Form, considered in Relation to the Strength of 

 Railway Axles and other portions of Machinery subjected to rapid 

 alterations of Strain. By F. J. Bramavell, C.E 422 



On the Penetration of Armour-plates with long Shells of large capacity 

 fired obliquely. By Joseph Whiiworth, C.E., F.R.S., LL.D., D.C.L. 430 



Report of the Committee on Standards of Electrical Resistance 434 



NOTICES AND ABSTRACTS 



OF 



MISCELLANEOUS COMMUNICATIONS TO THE SECTIONS. 



MATHEMATICS AND PHYSICS. 



Address by Professor J. J. Sylvester, LL.D., F.R.S., President of the Section. 1 



Mathematics. 



Mr. W. K. Clifford on the Theory of Distance 9 



on the Umbilici of Anallagmatic Sui-faces 9 



Mr. M. Collins on the Common Tangents of Circles 9 



Mr. R. B. Hay^'ard's sketch of a Proof of Lagrange's Equation of Motion 



refeiTed to Generalized Coordinates 10 



Mr. F. W. Newman on CmTes of the Thii-d Degree, here called Tertian .... 10 



on the Curvature of Surfaces of the Second Degree .... 13 



on Conic Oscidation 13 



Dr. W. J. Macquorn Rankine's Summary of the Thermodynamic Theory 



of Waves of Finite Lono-itudinal Disturbance 14 



