194 ECONOMIC GEOLOGY. 



[Discovery of Tin-ore at Campiglia.] Boll. II. Com. cjeol. Ital. 



vol. vii. pp. 52-54. 

 Cento Camcrelle, on the W. side of Monte Fumacchio, is the name 

 given to old workings of Etruscans and Eomans, who mined the iron- 

 deposits. A small tin-vein is now fonnd here, accompanied with 

 limonite ; it has an E.-W. direction, with underlay to S., and is en- 

 closed in L. Lias limestones. In the neighbourhood are hot springs, 

 which rise from a manganese vein. E. B. T. 



Boyd, C. The Mineral Wealth of South-Eastern Yirginia. Iron, 

 n. s. vol. viii. pp. 330, 424. (Amer. Inst. Min. Eng.) 



Gallon, J. Lectures on Mining .... Translated by Dr. C. Le Neve 

 Foster and W. Galloway. 8vo. London and Paris. Yol. i. 

 pp. vii, 459 ; 4to Atlas of 40 plates (i.-viii. geological). 



Chap. i. Definitions ayid Introduction : Summary of geological prin- 

 ciples ; description of beds, lodes, faults, <&:c. Chap. ii. Various Ex- 

 amples of Deposits : Coal-fields ; lodes of Pribram, Freiberg, and 

 Cornwall ; Mass-deposits of Montchanin, Mokta-el-Hadid, Stahlberg, 

 Saint-Pancre. Chap. iii. Prospecting or Search for Minerals : Various 

 indications, geological structure, outcrops, &c. The rest of the work 

 treats of boring, sinking, and mining generally. Artesian wells are 

 described on pp. 89-96. W. T. 



Collins, J. H. Principles of Coal Mining. Pp. 140, woodcuts. Bvo. 

 London and Glasgow. 



Cramer, H. Beitrage zur Geschichte des Bergbaues in der Provinz 

 Brandenburg. Heft 4. Pp. 112. Bvo. Halle. 



Dawkins, Prof. W. Boyd. On the Water Supply in the Bed llocks 

 of Lancashire and Cheshire. Trans. Manch. Geol. Soc. vol. xiv. 

 pt. vi. pp. 133-143. 



Describes the Permian and Triassic sandstones as saturated with 

 water, in such quantity that it has not been necessary to sink 

 wells much below the sea-level. The Permian, from its varying thick- 

 ness, is an uncertain source ; but the jS'ew Bed has a gross thickness of 

 1700 to 1900 feet, consisting of sandstones of various degrees of 

 porosity. Considers that there is no evidence that faults are water- 

 tight barriers, or that the quantity of water decreases in depth. 

 Suggests that in the Triassic area of Lancashire and Cheshire there is 

 a vast subterranean lake fed by subaerial wells. C. E. D. 



Dunnachie, J. Fire-Bricks. Iron, n. s. vol. viii. p. 587. {British 



Assoc.) 

 Notes geological position and character of Scotch fire-clays. 



Eassie, W. On the so-called Deposits of Onyx near Mexico ; their 

 History, and their Value as a Decorative Material. Journ. Soc. 

 Arts, vol. xxiv. no. 1222, pp. 603^511. 



