[ 447 ] 



XLIV. Notices respecting New Books. 



Anleitung zur mikrochemisehen Analyse der wichtigsten organisclien 

 Verbindungen. Vol. III. By Prof. H. Behrens. Hamburg: 

 Voss, 1896. 

 rPHE rapid development of organic chemistry, and more especially 

 ;*- the discovery of substances chemically almost identical but phy- 

 sically different, has caused the chemist to turn his attention to 

 physical instruments, with the result that the polarimeter, polari- 

 scope, and refractometer are to be found in every well-equipped 

 laboratory for chemical research. Prof. Behrens now seeks to 

 introduce the microscope to the organic chemist, and in the three 

 parts of his work which have already appeared he describes the 

 behaviour of the more important organic compounds when crystal- 

 lized, or treated with reagents, on the stage of the microscope. 

 The reactions described result in the formation of crystals, the 

 size, shape, and optical characters of which are specified. The 

 present volume deals with the aromatic amines, and is enriched by 

 77 illustrations of microscopic crystals obtained by precipitation. 

 It should prove a useful handbook in the organic laboratory. 



i. L. H. 



XLY. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 



[Continued from p. 372.] 



June 10th.— Dr. Henry Hicks, F.R.S., President, 



in the Chair. 



HPHE following communications were read : — 

 -*- 1. ' On Foliated Granites and their Relations to the Crystal- 

 line Schists in Eastern Sutherland.' By J. Home, Esq., E.R.S.E., 

 F.G.S., and E. Greenly, Esq., E.G.S. 



The crystalline schists of Eastern Sutherland are traversed by 

 great numbers of granitic intrusions, chiefly in the form of lenticular 

 sills. These generally lie parallel to the foliation-planes of the 

 schists, but transgressive junctions are also frequent. Thin seams 

 of granite also occur in such abundance as to constitute with the 

 schists a banded gneissic series ; but these seams can often be seen 

 to transgress the schistose folia, and even often to proceed from 

 large masses of granite. The granites contain numerous inclusions 

 of the schists which they traverse, such inclusions retaining, usually, 

 the dip and strike of the surrounding rocks. 



There are no chilled edges; and, moreover, the component crystals 

 of schist and granite mutually interlock along the lines of junction. 



The authors give an account of the foliation of the granite. In 

 some rare cases a foliation parallel to that of the schists traverses 

 granite-veins. It is generally, however, parallel at once to the 

 sides of the sill and to the foliation of the schists ; and many of the 

 structures are the remains of biotite-folia belonging to schists 

 whose quartzo-felspathic elements have been incorpoiated with 



