ee 
CONTENTS. ; v 
Page 
‘Report on Optical Theories. By R. T. Grazeproox, M.A., FLRS. ........6 157 
Report of the Committee, consisting of Professors Ramsay, Trxpnn, Mar- 
SHALL, and W. L. Goopwin (Secretary), appointed for the purpose of 
investigating certain Physical Constants of Solution, especially the Expan- 
sion of Saline Solutions .............00.0000e bn cates SP SoM s ciao Bact Bataan alae scan etde 261 
‘Third Report of the Committee, consisting of Professors WILLIAMSON, DEwaR, 
FRANKLAND, Crum Brown, Opiine, and Armstrone, Drs. Hueco MULLER, 
F. R. Japp, and H. Forster Mortey, and Messrs. A. G. Vernon Har- 
court, C. E. Groves, J. Mirnar Tuomson, H. B. Drxon (Secretary), and 
V. H. Veter, reappointed for the purpose of drawing up a statement of 
the varieties of Chemical Names which have come into use, for indicating 
the causes which have led to their adoption, and for considering what can 
be done to bring about some convergence of the views on Chemical Nomen- 
clature obtaining among English and foreign chemists...........-06..00e00eseee 262 
Report of the Committee, consisting of Professors Optmne, HuntTrNeTon, and 
Harrtery, appointed to investigate by means of Photography the Ultra- 
Violet Spark Spectra emitted by Metallic Elements and their combinations 
under varying conditions. Drawn up by Professor W. N. Hartey, F.R.S. 
MSTCUALY) ian -(n <2 dswascecls on ascendsncthsaela daceceaddesenoeasesecivennernnscenenieeds veces 276 
Report of the Committee, consisting of Professor TinpEN, Professor W. 
Ramsay, and Dr. W. W. J. Nico (Secretary), appointed for the purpose 
of investigating the subject of Vapour Pressures and Refractive Indices of 
AMG SOMILIONS 2-2 .c.c0r~co-tscececcoccsosssccatescnceccscssncensccrsoseacsennsqseqarerucnoos 284 
Report of the Committee, consisting of Professor Sir H. E. Roscox, Mr. J. N. 
Locxyrr, Professors Dewar, Wotcorr Gripss, Livere, ScHusrER, and 
W.N. Harrtey, Uaptain Asney, and Dr. MarsHatt Warts (Secretary), 
appointed for the purpose of preparing a new series of Wave-length Tables 
of the Spectra of the Elements and Compounds............sseseseeeseeeneceeeenees 288 
‘Thirteenth Report of the Committee, consisting of Professors J. PResrwicu, 
W. Boyp Dawkins, T. McK. Hueuus, and T. G. Bonnzy, Dr. H. W. 
Orosskry (Secretary), Dr. Dranz, and Messrs. C. E. Dz Rancs, H. G. 
Forpuam, J. E. Lez, D. Mackrntosu, W. PenceEtty, J. Pant, and R. H. 
TIDDEMAN, 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 ............ 322 
‘Third Report of the Committee, consisting of Mr. R. Ernrripexr, Dr. H. 
Woopwarp, and Professor T. Rupert JonEs (Secretary), on the Fossil 
etyllopoda of the Paleeozoic Rocks......-.....0c.0+.oscoosescovsetvsesonscosencensans 826 
Fifth Report of the Committee, consisting of Mr. R. Ernerrper, Mr. THoMAs 
Gray, and Professor Joun Minne (Secretary), appointed for the purpose 
of investigating the Earthquake Phenomena of Japan. Drawn up by the 
OPEL REDDY) bcotectteecacdigrduanee cnaer aoa ctinn on eas sor adc Rasa Macc Bec eSeeSS ac DEES anne mrstnr 362 
Eleventh Report of the Committee, consisting of Professor E. Hutz, Dr. 
H. W. Crossxey, Captain Dovetas Gatton, Professors J. PREstwiIcH 
and G. A. Lrsovr, and Messrs. JAMES GLAISHER, E. B. Marren, G. H. 
Morton, JAMEs Parker, W. PENGELLY, JAMES Prant, I. Roperts, Fox 
Straneways, T. S. Srooxz, G. J. Symons, W. Torrey, TyLtpEn-WricuHt, 
E. WetHerep, W. Warraker, and C. E. Dr Rance (Secretary), ap- 
ointed for the purpose of investigating the Circulation of Underground 
aters in the Permeable Formations of England and Wales, and the 
Quantity and Character of the Water supplied to various Towns and J)is- 
tricts from these Formations. Drawn up by C. E. Dp RANce .............+. 380 
