208 PETROLOGY. 



Came, Elizabeth T. On Transition and Metamorphosis of Eocks in 



the Land's End District. Trans. R. Geol. Soc. Cornwall, vol. ix. 



part i. pp. 1-21. 



Distingnishes Swell marked kinds of rock : — 1, Granite; 2, Hornblende- 



and actinolite-rock and greenstone ; 3, Purple killas ; 4, Felspathic 



rocks, including elvans ; 5, Coarse and fine-grained rocks or Lelant 



beds. Endeavours to show that some of these rocks pass into one 



another. Combats the theory of the metamorphic origin of granite. 



C. L. N. F. 



Chevron, L. Analyses de quelques roches crystallines de la Belgique 



et de I'Ardenne f rancjaise. [Analyses of some Crystalline liocks of 



Belgium and the French Ardennes.] Ann. JSoc. Geol. Belg. t. ii., 



Mernoires, pp. 189-196. 



The analyses are : — i. Of Eurites from Spa, Monstreux, Grand-Manil, 



and Piroy. ii. Biorites from Challes-lez-Stavelot, Quenast (massive 



chlorophyre of Dumont), and Lembecq. iii. Ampliiholite from N. of 



Maims (Diorite of Dumont). iv. Gahhros from Hozemont (Hyper- 



sthenite of Dumont) and Les Tombes (Mozet). v. Chloriteschist from S. 



of Mairus, vi. Porphyroids from Marius mill (Hyalophyre of Dumont), E. 



of Revin (Slaty Albite of Dumont), Bois des Rois, Eouquieres (schistose 



Chlorophyre of Dumont), and Pilet (Eurite of Dumont). G. A. L. 



Church, Prof. A. H. Ked Chalk and Red Clay. Chem. News, vol. 



xxxi. pp. 199, 200 ; also Geol. Mag. dec. ii. vol. ii. pp. 331-334. 

 The author has separated from the red chalk of Hunstanton a reddish 

 clay like that described by the officers of the ' Challenger ' as occurring 

 at great depths in the Atlantic. The chalk yielded about 9-3 p. c. of 

 residue, the analysis of which is here published. It appears to resemble 

 deep-sea clay. The relationship of the white, the grey, and the red 

 chalk to the globigerina ooze, the grey, and the red ooze respectively 

 is pointed out. F. W. R. 



Colson, C. Experiments on the Portland Cement used in the Ports- 

 mouth Dockyard Extension Works. Proc. Inst. Oiv. Eng. vol. xli. 

 p. 125. 

 Analyses of Gault Clay and Grey Chalk from Burham, Kent, and of 

 river-mud from the Medway, are given on pp. 141, 142. 



Credner, Prof. Hermann. Die granitischen Gauge des sachsischen 



Granulitgebirges. [Granitic Veins of the Granulite Rocks of 



Saxony.] Zeitsch. deutsch. geol. Ges. pp. 104-223. 



The granulites of Saxony are cut through by a great number of veins 



of granite, syenite, and pegmatite. These are narrow and run but 



short distances, their directions varying according to no apparent rule. 



25 mineral species are found associated with them, many being pseudo- 



morphs. The groupings of these minerals in the different veins are 



classified under 9 heads. The infiUings of the granite veins are 



the result of the decomposition and falling in of the neighbouring rocks, 



brought about by water trickling from above : they are in no wise 



eruptive or due to hot springs. G. A. L. 



