APPLIED AND ECONOMIC. 189 



the position, hade, proved extent, dislocations, and points of richness of 

 each vein. G. A. L. 



Cleve, p. T. Om Stenkol, dcras uppkomst, utbredning och betydelse. 



[Coal, its origin, distribution, and importance.] Second edition 



of ' Ur vlr tids forskning,' pt. i. 8vo. Stockholm. Pp. 1-60, 17 



illustrations. 



A general account of coal from a geological, mining, and commercial 



point of view. The article on the Coal-field of Scania, by E. Erdmann, 



is noticed at p. 60. G. A. L. 



CoRFiELD, Dr. W. H. Lectures delivered at the School of Military 

 Engineering, Chatham, on Water Supply, <fec. Pol. Chatham, 

 1874. (Printed for private circulation.) 

 Lecture 1. Chemical qualities of water. Lecture 2. Wells and 

 springs and the water-bearing formations of England. 



DiAZE, Yice-Consul. Report on the Trade and Commerce of Huelva 

 for the year 1872, Reports from Her Majesty's Consuls, Com- 

 mercial No. 5 (1874), part i. 8vo. Pp. 279-288. 

 Notes on the produce of pyrites, copper, and manganese. The most 

 important mines of the district are Tharsis, Calaiias, Lagunazo, La- 

 pilla, Buitron, and Sotiel. W. T. 



DiBOs, E. Les puits art^siens en Algerie. [Artesian wells in Algeria.] 

 Rev. mar. et col. pp. 10-14. 



Erdmann, Edw. Om borrning efter stenkol. [On boring for coal.] 



Geol. foren. Stockholm Forhandl. bdt. i. pp. 130-138, plates xi., 



xii. 



Discusses the processes of reasoning involved in proving the seams 



of a coal-field by borings, and gives many details of the dips and 



thicknesses of the coal-seams in Scania and elsewhere as illustrations. 



The thinning and changes of scams and their accompanying beds are 



explained and illustrated. G. A. L. 



FiRKET, Ad. Carte de la production, de la consommation ct de la 

 circulation dcs minerais de fer, de zinc, de plomb et des pyrites en 

 Belgique, pendant I'annee 1871. 1 sheet, scale sTnyWrT' Brussels. 



. Note on the above. 12 pp. Liege. 



Gfrstel, G. [On the Drainage of Clay Mountains.] AUgemeine 

 Rauzeitung, nos. 1-4, 32 cols. 4 pi. 



Gives an account of the means adopted to prevent slips during the 

 construction of the Schiissburg-Kronstadt line of the East Hungarian 

 railway. The beds traversed are of Tertiary age ; they consist of loam, 

 calcareous clay, and grey marly clay, the whole resting on a stiff blue 

 clay (Tegel) of small dip and undetermined depth. The yellow clay 

 cracks very much in dry weather ; water finds its way down to the 



