Reports and Proceedings — Geological Society of London. 429 



gives the latest modifications of Lis electric seismoscope, and apparatus 

 for the same purpose are described by Dr. Cancani and Mr. Guzzanti. 

 Professor Tacchini refers to some old instruments in the possession 

 of the Central Office of Meteorology and Geodynamics, and suggests 

 that they might form the nucleus of a seismometrio museum. 

 Dr. Cancani discusses the difi"erent methods of registration ; dis- 

 carding the photographic method on account of its expense, he 

 prefers mechanical registration by a fine point on smoked paper to 

 that made by ink flowing from a balanced pen. 



There are some useful investigations of recent earthquakes. 

 Dr. Cancani describes the Adriatico-Marches earthquake of Sept. 21, 

 1897. Dr. Agamennone studies the pulsations of several distant 

 earthquakes, namel}'^, the Indian earthquake of June 12, 1897, the 

 Turkestan earthquakes of August 15 and September 17, 1897, and 

 the Haiti earthquake of December 27, 1897 ; the two papers on the 

 Indian earthquake being among the most valuable that have yet 

 been published by the Society. Dr. Papavasiliou completes his list 

 of Greek earthquakes in 1897, and also furnishes the catalogue for 

 1895 : work that will without doubt bear fruit in due season. 

 A supplement of 255 pages contains the admirable records of Italian 

 earthquakes (July-December, 1897) compiled by Dr. Agamennone, 

 the chief assistant in the Central Office, and recently appointed to 

 the important post of Director of the Geodynamic Observatory of 

 Eocca di Papa, near Rome. 



The newest branch of seismology is represented by two papers, 

 besides those referred to in the last paragraph ; one by Professor 

 Grablovitz on the form of the slow oscillations in earthquakes, the 

 other by Messrs. Agamennone and Bonetti on the different methods 

 of determining the position of the epicentre in distant earthquakes of 

 unknown origin. 



The volcanic phenomena of the country are as usual the subject 

 of careful study. Mr. R. V. Matteucci writes on the increase in 

 activity presented by Vesuvius during the months of April and 

 May, 1898. Professor Mercalli continues his valuable Vesuvian 

 notices (January, 1897 — July, 1898), and Mr. Arcidiacono his 

 equally useful accounts of the principal eruptive phenomena in 

 Sicily and the adjacent islands during 1898. C. Davison. 



iaE^>OK,TS J^ISTID IPE-OGDBZESIDHSrCa-S. 



Geological Society of Londoit. 



June 21, 1899.— W. Whitaker, B.A., F.E.S., President, in the 

 Chair. The following communications were read : — 



1. " On a Series of Agglomerates, Ashes, and Tufi"s in the 

 Carboniferous Limestone Series of Congleton Edge." By Walcot 

 Gibson, Esq., F.G.S., and Dr. Wheelton Hind, F.R.C.S., F.G.S. 

 With an Appendix on the Petrography of the Igneous Rocks by 

 H. H. Arnold-Bemrose, Esq., M.A., F.G.S. 



