Geological Society. 201 
very wide, and from the list of future contributors it appears that 
the editors have been successful in securing the cooperation of 
many distinguished men of science from many lands, each of 
whom writes in his own language. We wish this high-class 
international publication every success, and hope that it will be 
instrumental in counteracting some of the evils which arise from 
over-specialisation. 
Solubilities of Inorganic and Organic Substances. By A. Seidell, 
Ph.D. New York : D. Van Nostrand Co. London : Crosby 
Lockwood & Son. 1907. Pp. 368. 
This important work of reference may be regarded as taking the 
place of Professor A. M. Comey's ' Dictionary of Chemical 
Solubilities,' published in 1894. Its compilation must have 
involved a very large amount of labour, and chemists will feel 
grateful to the author for the care and devotion which he has 
brought to bear on his somewhat formidable task. The substances 
are arranged in alphabetical order, and in addition an excellent 
index is provided at the end of the book. Great care has evidently 
been taken by the author to select the most reliable data in cases 
where a number of determinations was available. In warmly 
commending this useful work to the attention of chemists and 
physicists, we should like to draw their attention to the following 
extract from the author's Preface : — "A glance through the pages 
of this book wiil show the incompleteness of the data for many of 
the most common chemical compounds. Furthermore, many of 
the results given are of doubtful accuracy, although the best 
available. It is hoped, therefore, that a realisation of the present 
incomplete state of our information concerning solubilities as 
evidenced in these pages will stimulate investigations of many of 
those substances which have hitherto been studied iucompletely or 
not at all." 
XY . Proceedings of Learned Societies, 
GEOLOGICAL SOCIETY. 
[Continued from vol. xiv. p. 787.] 
November 6th, 1907.— Sir Archibald Geikie, K.C.B., D.C.L., Sc.D., 
Sec.R.S., President, in the Chair. 
HHHE following communications were read : — 
1. ' On a Collection of Fossil Plants from South Africa.' Bv 
Prof. Albert Charles Seward, M.A., F.E.S., F.G.S. 
2. ' Permo-Carboniferous Plants from Vereeniging (South Africa)/ 
By Prof. Albert Charles Seward, M.A., F.R.S., F.G.S., and Thomas 
Nicholas Leslie, F.Gr.S. 
3. ' On the Structure and Relations of the Laurentian System of 
Canada.' By Prof. Frank Dawson Adams, D.Sc, F.B.S., F.C.S. 
This paper contains an outline of the results of the examination 
by Dr. Barlow and the author of an area of 4200 square miles, 
Phil Mag. Sr. 6. Vol. 15. No. 85. Jan, 1908. P 
