CONTENTS. V 



Page 

 Dover Tide-gauge, and for connecting them with Observations made on the 

 French Coast 161 



Eeport of the Committee, consisting of Professor Sir H. E. RoscoE, Mr. 

 LocKTEE, Professors Dewak, Livehtg, Schuster, W. N. Hartley, and 

 WOLCOTT GiBBS, Captain Abnet, and Dr. Marshall Watts (Secretary), 

 appointed for the purpose of preparing a new series of Wave-length Tables 

 of the Spectra of the Elements 167 



Second Report of the Committee, consisting of Professor Tilden, Professor W. 

 Ramsat, and Dr. W. W. J. NicoL (Secretary), appointed for the purpose 

 of investigating the subject of Vapour Pressures and Refractive Indices of 

 Salt Solutions 204 



Second Report of the Committee, consisting of Professors Ramsat, Tilben, 

 Marshall, and W. L. Goodwin (Secretary), appointed for the purpose of 

 investigating certain Physical Constants of Solution, especially the Expan- 

 sion of Saline Solutions 207 



Report (Provisional) of the Committee, consisting of Professors McLeod and 

 W. Ramsay and Messrs. J. T. Ctindall and W. A. Shenstone (Secretary), 

 appointed to investigate the Influence of the Silent Discharge of Electricity 

 on Oxygen and other Gases 213 



Report of the Committee, consisting of Professors Tilden and Armstrong 

 (Secretary), appointed for the purpose of investigating Isomeric Naphthalene 

 Derivatives 216 



Report of the Committee, consisting of Professor T. McK. Hughes, Dr. H. 

 HiCES, and Messrs. H. Woodwarb, E. B. Luxmoore, P. P. Pennant, 

 and Edavin Morgan, appointed for the purpose of exploring the Caves of 

 North Wales. Drawn up by Dr. H. Hicks, Secretary 219 



Fourteenth Eeport of the Committee, consisting of Professors J. Prestwich, 

 W. Boyd Dawkins, T. McK. Hughes, and T. G. Bonnet, Dr. H. W. 

 Crosskey (Secretary), and Messrs. C. E. De Range, H. G. Fordham, 

 J. E. Lee, D. Mackintosh, W. Pengellt, J. Plant, and R. H. Tidde- 

 MAN, appointed for the purpose of recording the position, height above 

 the sea, lithological characters, size, and origin of the Erratic Blocks 

 of England, Wales, and Ireland, reporting other matters of interest con- 

 nected with the same, and taking measures for their preservation 223 



Report of the Committee, consisting of Mr. H. Bauerman, Mr. F. W. 

 Rudler, Mr. J. J. H. Teall, and Dr. Johnston-Lavis, for the Investi- 

 gation of the Volcanic Phenomena of Vesuvius and its neighbourhood. 

 Drawn up by H. J. Johnsion-Lavis, M.D., F.G.S. (Secretary) 226 



Fourth Report of the Committee, consisting of Mr. R. Etheridge, Dr. H. .- 



Woodward, and Professor T. Rupert Jones (Secretary), on the Fossil ^ 



Phyllopoda of the Palaeozoic Rocks 229 



Twelfth Report of the Committee, consisting of Professor E. Hull, Dr. 

 H. W. Crosskey, Captain Douglas Galton, Professors J. Prestwich 

 and G. A. Lebour, and Messrs. James Glatsher, E. B. Marten, G. H. 

 Morton, James Parker, W. Pengelly, James Plant, I. Roberts, Fox- 

 Strangways, T. S. Stooke, G. J. Stmons, VV. Toplet, Tylden-Wright, 

 E. Wethered, W. Whitaker, and C. E. De Range (Secretary), ap- 

 pointed for the purpose of investigating the Circulation of Underground 

 Waters in the Permeable Formations of England and Wales, and the 

 Quantity and Character of the Water supplied to various Towns and Dis- 

 tricts from these Formations. Drawn up by C. E. De Range 235 



