328 Reviews — Bulletin of Seismological Society of America. 



The data at present available are insuflScient for even tlie broadest 

 generalizations. Petrologists must recognize the need of quantitative 

 data, of adequate chemical analyses, and of the complete collection of 

 data in the field. Only thus can they hope for the successful 

 application of the principles of physical-chemistry to the solution of 

 the complex problems of petrology. 



IV. — Bulletin of the Seismological Societt of America. 



IN" the issue for March, 1914 (vol. iv, No. 1), a useful epitome 

 of the seismological work of John Milne is given by Comte de 

 Montessus de Ballore.' 



A brief historical account of Milne's life-work, in which it is pointed 

 out that he was always a decided partisan of the tectonic or geologic 

 origin of earthquakes, forms an introduction to an admirably arranged 

 bibliography of Milne's papers. The fourteen heads under which 

 the references are grouped greatly facilitate the selection of those 

 which deal with any particular branch of the subject of seismology, 

 and in every case notes, giving a general idea of the contents, are 

 appended to those of most importance. 



Under separate headings we find a record of papers on geographical 

 and geological points of view, volcanoes, internal heat and state of 

 the globe, and other aspects of the subject. 



This analysis of Milne's work should prove valuable to all who 

 are intei'ested in any of the numerous branches of seismological 

 investigation. 



Y. — The Cotteswold ISTatuealists' Field Club. 



The Proceedings for December 1913, being pt. ii of vol. xviii, 

 contain a record of the excursions and meetings of this Club 

 during 1913. Visits were paid to Tidenham Chase and Tintern, 

 the Sherborne district of Dorset, Wotton-under-Edge, and other 

 interesting localities. Mr. L. llichardson contributes a geological 

 map, on the 6 in. scale, of the southern part of Cheltenham and the 

 adjoining country, which shows the distribution of both the superficial 

 and solid rocks. The unusual colour-scheme adopted is somewhat 

 confusing, although in other respects the map is quite clear. Twelve 

 pages of text are given in explanation of the sheet. A map of the 

 northern part of Cheltenham, with explanation, was published in 

 pt. iii, vol. xvii, of the Proceedings of the Club. Professor Lapworth 

 discusses the origin of the boulders collected in the grounds of 

 Bournville, Birmingham, and gives a brief sketch of the glaciology 

 of the Midlands. An account of the water supply of Cirencester is 

 given by T. Hibbert and L. Richardson ; the latter also records the 

 details of a deep boxing at Kemble passing through 353 feet of strata 

 from Great Oolite to Upper Lias. 



^ A life of Professor John Milne, F.E.S., with his portrait and a list of his 

 published works, appeared in the Geol. Mag. for August, 1912, pp. 337-46; 

 his death was recorded (July 31, 1913) in the Geol. Mag., September, 1913, 

 p. 432. 



