Revieivs — llic Geological Sociefi/ of Glasgow. 223 



contains little pellets of ferruginous material, and the outside layer 

 is in places crystalline. 



The extent of the deposit is unknown, but there are at least 

 4 or 5 bushels in sight, and every evidence that the seam is much 

 more extensive at the junction of the Thanet Sand with the Chalk, 

 which is about 2 feet above the roof of the denehole. 



Professor John Morris ^ in 1 857 described the occurrence of 

 allophane at Charlton (the first English record), and gave an account 

 of the condition and position of deposit which seems to be essentially 

 the same as above described. He also gives the analyses of several 

 allied minerals, all of which differ from the analysis given here ; 

 however, the constitution of Professor Morris' allophane approximates 

 remarkably to Mr. Foucar's analysis, the only difference being 

 10 per cent, more silica and 10 per cent, less alumina, the water 

 and impurity being exactly the same. A comparison of the Charlton 

 and Abbey "Wood allophanes and a specimen from Beauvais are given 

 below. 



Silica. Alumina. "Water. Analysis by 



Charlton Allophane (Prof. 



Morris) . . . lS-89 33-52 42-73 Carb. lime 4-38 Dick. 

 Abbey Wood ,, (R.H.C.) 28-80 23-52 42-04 ,, 4-37 J. L. Foucar 



Beauvais , , (Prof. 



Morris) . . , 21-90 29-20 44-20 Clay 4-7 Berthier 



The above is, so far as I can ascertain, the largest deposit j-et 

 recorded, other notices speaking of ' some ' allophane being reported, 

 and although no definite quantities are stated, the implication is 

 that the amount was small. 



Since writing the above Mr. Foucar has been good enough to 

 analyze another specimen, with the same results as given before. 



I^ E '^ I E "W S 



I. — The Geological Society of Glasgow and its Jubilee. 



HisTOKY of the Geological Society of Glasgow, 1858-1908, with 

 Biographical Notices of Prominent Members. Edited by Peter 

 Macnaik, F.R.S.E., F.G.S., and Frederick Mort, M.A., F.G.S., 

 etc. 8vo ; pp. vi, 303, with 24 portraits and 2 other illustrations. 

 Glasgow : published by the Society, 207, Bath Street, 1908. 

 Price 6s. 



THIS volume was prepared to commemorate the Jubilee meeting of 

 the Society, which was held at Glasgow on January 28. In the 

 opening chapter a brief sketch is given of the geological features of 

 the Clyde Valley, to which the Society has naturally given special 

 attention ; and biographical notices are inserted of some of the 

 geological workers who had studied the rocks and fossils in earlier 

 days. Among these were the Rev. David Ure, author of The History 

 of Rutherglen and East Kilbride (1793), a work of great merit in 



1 Quart. Jouru. Geol. Soc, vol. xiii, pp. 13-17. 



