VI CONTENTS. 



Page 

 BoTJENE, Mr. Brittain, Dr. Hancock, Professor Jevons, and Mr. F. P. 

 Fellows, appointed for the purpose of inquiring into and reporting on the 

 present Appropriation of Wages, and other sources of iucome, and considering 

 how far it is consonant with the economic progress of the people of the 

 United Kingdom. Drawn up by Professor Leone Levi 272 



Report of a Committee, consisting of James Glaisher, F.R.S., F.R.A.S., 

 E. J. LoAVE, F.R.S., Professor R. S. Ball, F.R.S., Dr. AV alter Flight, 

 F.G.S., and Professor A. S. Herschel, M.A., F.R.A.S., on Observations 

 of Luminous Meteors dxiring the year 1880-81 290 



Report of the Committee, consisting of Professor Cayley, F.R.S., Professor 

 G. G. Stokes, F.R.S., Professor H. J. S. Smith, F.R.S., Professor Sir 

 William Thomson, F.R.S., Mr. James Glaisher, F.R.S., and Mr. J. W. 

 L. Glaisher, F.R.S. (Secretary), on Mathematical Tables 803 



Seventh Report of the Committee, consisting of Professor E. Hull, the Rev. 

 H. W. Orosskey, Captain Douglas Galton, Mr. James Glaisher, Professor 

 G. a. Lebour, Mr. W. Molyneux, Mr. G. II. Morton, Mr. W. Pengelly, 

 Professor J. Prestwich, Mr. J. Plant, Mr. James Parker, Mr. I. Roberts, 

 Mr. S. Stooke, Mr. G. J. Symons, Mr. W. Whitaker, aud Mr C. E. 

 De Rance (Reporter), appointed for the purpose of investigating the Cir- 

 culation of the Underground Waters in the Jurassic, New Red Sandstone, 

 and Permian Formations of England, and the Quality and Quantity of the 

 Water supplied to towns and districts from these formations 309 



Report of the Committee, consisting of Professor Dewar, Dr. Williamson, 

 Dr. Marshall Watts, Captain Abney, Mr. Stoney, Professor W. N. 

 Hartley, Professor McLeob, Professor Carey Foster, Professor A. K. 

 Huntington, Professor Emerson Reynolds, Professor Reinold, Professor 

 LivEiNG, Lord Rayleigh, Dr. Arthur Schuster, and Mr. W. Chandler 

 Roberts (Secretary), appointed for the purpose of reporting upon the present 

 state of our Knowledge of Spectrum Analysis 317 



Interim Report of the Committee for constructing and issuing practical 

 Standards for use in Electrical Measurements, the Committee consisting of 

 Professor G. Carey Foster, Mr. (!. Hockin, Professor Sir William Thom- 

 son, Professor Ayrton, Mr. J. Perry, Professor W. G. Adams, Lord 

 Rayleigh, Professor F. Jenkin, Dr. O. J. Lodge, Dr. John Hopkinson, 

 Dr. MuiRHEAD, Mr. W. II. Preece, and Mr. Herbert Taylor 423 



On some New Theorems on Curves of double Curvature. By Professor Sturm 440 



Observations of Atmosplieric Electricity at the Kew Obsenatory during 1880. 

 By G. M. Whipple, B.Sc, F.R.A.S'., F.M.S., Superintendent 443 



On the Arrestation of Infusorial Life by Solar Light. By Professor John 

 Tyndall, F.R.S ■ ■. 450 



On the Effects of Oceanic Currents upon ('limates. By the Rev. Samuel 

 Haughton, M.D., F.R.S 451 



On Magnetic Disturbances and Earth-currents. By Pi'ofessor William 

 Grylls Adams, F.R.S 463 



On some applications of Electric Energy to Horticultural and Agricultural 

 purposes. By C. Wm. Siemens, D.C.L., LL.D., F.R.S., Mem. Inst. C.E. 474 



On the Pressure of Wind upon a Fixed Plane Surface. By Thomas Hawks- 

 ley, C.E., F.R.S 480 



On the Island of Socotra. By Bayley Balfour, Sc.D., M.B., Regius Pro- 

 fessor of Botany, University of Glasgow 482 



On some of the Developments of Mechanical Engineering during the last 

 half-century. By Sir Frederick Bramwell, V.P. Inst. C.E., F.R.S 494 



