euPPLEiiENT For 1875. 361 



.::::. periodo glaciale. [Ueneral Review of the Glacial Period in Italy.] 

 Atti delV XI Concjresso degli Scienzati^ pp. 81. 4to. Rome. 



Procter, Dr. Basalt in the North of Ireland, and its formation. 

 ForJcshire Phil Soc. for 1874, pp. 29, 30. 



Basalt is part of a series which, when well marked, was composed of 

 (1) basalt, (2) pisolitic iron-ore, worked in Antrim, (3) bole, gradually 

 passing into (4) lithomarge. Prismatic structure is the result of the 

 contraction on cooling. R. B. N. 



Pmcha, Joseph. On the Use of Santorin Earth in the Construction 

 of Hydraulic Works on the Sea Coast. /Stummer^s IngenieuVf toI. 

 iv. pp. 248-265. (Abstract in Proc. Inst. Civ. Eng. vol. xlv. pp. 

 291-295.) 

 Santorin earth is composed of volcanic ashes. It is a coarse, sharp- 

 grained, ash-grey powder, mixed with fragments of pumice, obsidian, 

 and other substances. Analyses are given ; also of Trass and Puzzuo- 

 lana for comparison. "W. T. 



Rath, G. vom. Ueber die in der Nacht vom 29. zum 30. Marz d. J. 

 in Skandinavien niedergefallene vulkanische Ashe. [Yolcanic-ash 

 rain in Scandinavia, March 29-30, 1875.] Monatsh. Jc. preuss. 

 Ah. Wis8. pp. 282-28G. See Geological Record for 1875, p. 219. 



Raymond, R. W. Statistics of Mines and Mining in the States and 



Territories west of the Rocky Mountains. Seventh Annual Report. 



Pp. 540. 8vo. Washington. 



Part i. Condition of the Mining Industry, with plans and sections. 



Part ii. Metallurgical ; Rocky Mountain Coal, with analyses, pp. 430- 



433. Part iii. Miscellaneous ; Geology of the Sierra Nevada in its 



Rotation to Vein-mining, by A. Bowman, pp. 441-470, with maps and 



section. W. W. 



Roth, — . Ueber die Gesteine von Kerguelen's Land. Monatsh. k. 



preuss. Ah. Wiss. pp. 723-735. 

 Describes various igneous rocks. 



Ruskin, Dr. J. Deucalion : Collected Studies of the Lapse of Waves, 

 and the Life of Stones. Parts I. & II. Pp. 96. 8vo. Orpington, 

 Kent, 



[A collection of essays, lectures, and unpublished notes.] Chap. I. 

 The Alps and Jura (2 woodcuts, geological sections) : a description 

 of scenery and geological structure. II. The Three j^ras : broadly 

 speaking there are three great ffiras of the earth's history — those in 

 which it was (1) crystallized, (2) sculptured, and (3) that in which it 

 is now being deformed ; illustrations given from Scotland, Wales, and 

 the Alps. III. Of Ice-Cream : a description of glaciers, illustrated by 

 plate i. (First conditions of Accumulation and Fusion in Motionless 

 Snow). IV. Labitur et Lahetur : movements of and denudation by 

 glaciers and streams. V. The Valley of Cluse. VI. Of Butter and 

 Honey : an exposition of Forbes's theory of glacier-motion. W. T. 



