Reviewa — Geological Societ// of Glasgow. 225 



the Inuer and Outer Hebrides. The work of Lord Kelvin on 

 Geological Time, of Sir A. Geikie on Modern Denudation, and many- 

 other subjects are noticed, including Mr. J. G. Goodchild's solution 

 theory of igneous intrusion. Mineralogy and Petrology are dealt 

 with by Mr. Joseph Sommerville, and Stratigraphical Geology by- 

 Mr. Macnair, who treats with appropriate enthusiasm Professor 

 Lapworth's researches on the Southern Uplands, and notices many- 

 papers on the Carboniferous rocks and other formations. The article 

 on Palaeontology is by Mr. James jS^eilson, in which further particulars 

 are given of the older rocks and their organic remains. The labours 

 of James Armstrong, regarded as the leading palaeontologist of the 

 Society, are specially mentioned, and a full account is given of 

 researches relating to the Carboniferous fossils. 



Discussing the zonal classification of Dr. Vaughan, Mr. Neilson 

 points out how the range of certain species in Scotland differs from 

 that in the British area, and observes that he has been led to consider 

 many of the mutations of species as due to environment. 



Mr. John Smith, who is stated to be the father of the Society, 

 gives a summary of the work done on Glacial Geology. One of the 

 earliest papers, of which brief mention is made, is that now classic 

 essay " On the phenomena of the Glacial Drift of Scotland", by Sir A. 

 Geikie (1863), referred to at the jubilee meeting by Professor J. W. 

 Gregory as a paper which " at once lifted British glacial geology on to 

 a new plane ". Mr. Smith, who has dealt in detail with the Glacial 

 Deposits of Ayrshire, expresses his belief in the marine origin of the 

 boulder-clays. 



Three chapters are occupied with Biographical JS'otices of Members 

 and of some other geologists who have been associated in the work 

 of the Society, many of the short memoirs being accompanied by 

 portraits. 



The concluding chapter deals with the present position of the 

 Society, and it is noted that forty years ago the number of members 

 was 231, now it is 228. It is remarked that " In most sciences the 

 day of the amateur has departed. Palaeontologists tell us that the great 

 mammals of Tertiary times disappeared through over-specialisation. 

 In many branches of geology the amateur, at any rate as a large 

 contributor of original work, is being hurried to extinction by the 

 same cause ". There is, however, abundant work for geologists who 

 have had no *' highly technical training", if only they are not dismayed 

 by modern palaeontological nomenclature. The volume will be 

 appreciated by those interested in the history and progress of geology, 

 and it will be a valuable work of reference to those engaged in a study 

 of the rocks and fossils of Western Scotland. 



It was appropriate that Sir Archibald Geikie, who was elected an 

 Honorary Member of the Glasgow Geological Society in 1863, and 

 served as President from 1893 to 1896, should be invited to give an 

 address at the jubilee meeting. The ceremony, which was held at the 

 University buildings, took the form of a conversazione, the guests 

 being received by the Principal, Sir Donald MacAlister, K.C.B., and 

 Lady MacAlister, together with Sir A. Geikie, Professor J, W. Gregory 

 (President of the Glasgow Geological Society), and Dr. B. N. Peach. 



DECADE V. VOL. VI. — NO. V. 15 



