CONTENTS. V 



rage 

 II. On tlie Cumparisor. of Eartliquake Registers from Kew, Shide, 



Bidston, and Edinburgh. By J. Milne 44 



III. On the liecords obtained from two similar Seismographs at Kew. 



By I)r. Chakles Cheek 51 



IV. Movements of Horizontal Pendulums in relation to Barometric 



Pressure. By J. Milne 53 



V. An Attempt to Measure Earth Movements at Ilidgeway Fault. 



By HOEACE LtAKWIN 52 



Tables of Certain Mathematical Functions. — Report of tlie Committee, con- 

 sisting' of Lord Kelvin (Chairman), Lieutenant-Colonel Allan Cunnixg- 

 HAM, R.E. (Secretary), Dr. J. W. L. Ulaishle, Professor A. G. Geeenhill, 

 Professor W. M. HiCK'i!, Professor A. Lodgr, and Major P. A. MacMahon, 

 R.A., appointed for calculating Tables of Certain Mathematical Functions, 

 and, if necessary, for taldng steps to carry out the calculations, and to 

 puhliwh the Jesuits in an accessible form 54 



Meter/Dlogical Observations on Ben Nevis. — Report of the Committee, consist- 

 ing of Lord M'Laren, Professor A. CErJi Broavn (Secretary), Sir John 

 MuRBAY, Professor R. CorELAifD, and Dr. Alexander Buchan. (Drawn 

 up by Dr. Btjciian.) 54 



The Clearing of Turbid Solutions, and the Movement of Small Suspended 

 Particles by the Influence of Light. By Professor G. Quincke GO 



I'nderground Temperature. — Twenty-second Report of the Committee, con- 

 sisting of Professor J. D. Eveeeti' (Chairman and Secretary), Lord Kelvin, 

 Sir Aechibald Geikie, Mr. Jajies Glaishek. Professor Edwaed Hull, 

 Dr. C. Le Neve Fostee, Professor A. S. IIer*chel, Professor G. A. 

 Lebovr, Mr. A. B. Wynne. Mr. W. Galloway, Mr. Joseph Dickinson, 

 Mr. G. F. Deacon, Mr. E. Wethered, Mr. A. Siraiian, Professor Michib 

 Smith, and Professor H. L. Callenbae, appointed for the purpose of 

 investigating the Rate of Increase of Underground Temperature downwards 

 in various Localities of Dry Land and Under Water. (Drawn up by Pro- 

 fessor EvEEETT, Secretary) 64 



Note sur r Unite de Pressiou. Par le Dr. C. E. Guillaujie 71 



Alloys. — Report of the Committee, consisting of Mr. F. II. Neville (Chair- 

 man and Secretary), xMr. C. T. Heycock, and Mr. E. II. Geiefixhs, ap- 

 pointed to investigate the Nature of Alloys 75 



Isomorphous Derivatives of Benzene. — Second Report of the Committee, 

 consisting of Professor H. A. Miees (Chairman), Dr. W. P. Wynnf, and 

 Dr H. E. Aemsteong (Secretary). (Drawn up by the Secretary.) 78 



On Wave-lengthTablesof the Spectra of the Elements and Compounds. — Report 

 of the Committee, consisting of Sir H. E. RoscoE (Chairman), Dr. Mar- 

 shall Watts (Secretary), Sir J. N. Lockyee, Professor J. Dewar, Pro- 

 fessor G. D. Liveing, Professor A. Schuster, Professor W. N. H.4.rtley, 

 Professor AVolcott Gibbs, and Captain Sir W. de W. Abney 79 



Isomeric Naphthalene Derivatives. — Report of the Committee, consisting of 

 Professor W. A. Tilden (Chairman) and Dr. H. E. Aemsteong (Secretary). 

 (Drawn up by the Secretary.) 152 



Bibliography of Spectroscopy. — Report of the Committee, consisting of Pro- 

 fessor H. McLeod (Chairman), Sir W. C. Robeets-Austen (Secretary), 

 Mr. H. G. Madan, and Mr. D. H. Nagel 15.t 



Absorption Spectra and Chemical Constitution of Organic Substances. — Third 

 Interim Report of the Committee, consisting of Professor W. Noel Hartley 

 (Chairman and Secretary), Professor F. R. Japp, Professor J. J. Dobbie, 

 and Mr. Alexander Lauder, appointed to investigate the Relation between 

 the Absorption Spectra and Chemical Constitution of Organic Substances 208 



