VI CONTENTS. 



Page 

 obtaining information respecting the Phenomena of the Stationary Tides in 

 the English Channel and in the North Sea; and of representing to the 

 Government of Portugal and the Governor of Madeira that, in the opinion of 

 the British Association, Tidal Observations at Madeira or other islands in 

 the North Atlantic Ocean would be very valuable, with the view to the 

 advancement of our knowledge of -the tides in the Atlantic Ocean 217 



Second Report of the Committee, consisting of Professor Sir William 

 Thomson, Major-General Strachey, Captain Douglas Galton, Mr. G. F. 

 Deacon, Mr. Rogers Field, Mr. E. Roberts, and Mr. J. N. Shoolbred 

 (Secretary), appointed for the purpose of considering the Datum-level of the 

 Ordnance Survey of Great Britain, with a view to its establishment on a 

 surer foundation than hitherto, and for the tabulation and comparison of 

 other Datum-marks 21!) 



Report of the Committee on Instruments for Measuring the Speed of Ships, 

 consisting of Mr. W. Froude, Mr. F. J. Bramwell, Mr. A. E. Fletcher, 

 Rev. E. L. Berthon, Mr. James R. Napier, Mr. C. W. Merrlfield, Dr. 

 C. W. Siemens, Mr. H. M. Brtjnel, Mr. J. N. Shoolbred (Secretary), 

 Professor James Thomson, and Professor Sir William Thomson 219 



Report of a Committee appointed for the purpose of further developing the 

 investigations into a Common Measure of Value in Direct Taxation, the 

 Committee consisting of the Right Hon. J. G. Hubbard, M.P., Mr. Chad- 

 wick, M.P., Mr. Morlet, M.P., Dr. Farr, Sir George Campbell, M.P., 

 Mr. Hallett, Professor Jevons, Mr. Newmarch, Mr. SHAEN,Mr. Macneel 

 Caird, Mr. Stephen Bourne, Professor Leone Levi, Mr. Heyyvood, and 

 Mr. Hallett (Secretary) 220 



Deport on Sunspots and Rainfall. By Charles Meldrum, F.R.S 230 



Report on Observations of Luminous Meteors during the Year 1877-78, by a 

 Committee consisting of James Glaisher, F.R.S. , &c, R. P. Greg, F.G.S., 

 F.R.A.S., C. Brooke, F.R.S.. Professor G. Forbes, F.R.S.E., Walter 

 Flight, D.Sc, F.G.S., and Professor A.. S. Herschel, M.A., F.R.A.S. 

 (Reporter) 25s 



Sixth Report of the Committee, consisting of Sir John Lubbock, Bart., Pro- 

 fessor Prestwich, Professor Busk, Professor T. McK. Hughes, Professor 

 W. B. Dawkins, Professor Miall, Rev. H. W. Crossket, Mr. II. C. Sorby, 

 and Mr. R. H. Tiddeman, appointed for the purpose of assisting in the 

 Exploration of the Settle Caves (Victoria Cave). Drawn up by Mr. R. H. 

 Tiddeman (Reporter) .. 377 



Deport of a Committee, consisting of Mr. Godwin-Austen, Professor Prest- 

 wich, Mr. Davidson, Mr. Etheridge, Mr. Willett, and Mr. Topley, 

 appointed for the purpose of assisting the Kentish Boring Exploration. 

 Drawn up by Mr. Godwin-Austen 380 



Fourth Report of the Committee for Investigating the Circulation of the 

 Underground Waters in the Jurassic, New Red Sandstone, and Permian 

 Formations of England, and the Quantity and Character of the Waters 

 supplied to various Towns and Districts from these Formations ; with 

 Appendix, by Mr. Roberts, on the Filtration of Water through Triassic 

 Sandstone ; the Committee consisting of Professor Hull, Rev. H. W. 

 Crosskey, Captain D. Galton, Mr. Glaisher, Mr. II. H. Howell, Mr. G. 

 A. Lebour, Mr. W. Molyneux, Mr. Morton, Mr. Pengelly, Professor 

 Prestwich, Mr. James Plant, Mi-. Mellard Reade, Mr. W. Whitaker, 

 and Mr. De Rance (Reporter) 382 



Report of the Committee, consisting of James R. Napier, F.R.S., Sir W. 

 Thomson, F.R.S., W. Froude, F.R S., J. T. Bottomley, and Osborne 

 Reynolds, F.R.S. (Secretary), appointed to investigate the effect of Pro- 

 pellers on the Steering of Vessels 4l!» 



