APPLIED AND ECONOMIC. 205 



largely used ; and in the Lizard Serpentine Cornwall possesses the 

 handsomest ornamental stone in the kingdom. C. L. N. P. 



Keport of the Hydrotechnic Committee on the Diminution of "Water 



in Springs and Rivers. Zeitsch. des Oest. Ingenieur u. Architek- 



Vereins, nos. 8 & 9, 1875, pp. 157-165. Abstract in Proc. Inst. 



Civ. Eng. vol. xlii. pp. 271-273. 



Refers especially to the Danube, Rhine, and Elbe. The mean level 



of the Rhine is apparently unchanged ; but the low level is lower and 



the floods greater. The Elbe, at Dresden, shows a lowering of the 



mean level. The changes are due to cultivation, drainage, and the 



unsystematic destruction of forests. W. T. 



Reports on the Vienna Universal Exhibition of 1873. In 4 parts 

 (= vols.) 8vo. London. 



Part I. Colonial Produce, by W. Robinson, pp. 115-368. Raw 

 Materials, by Prof. Archer, pp. 309-428. Mining Produce, excluding 

 Fossil Euels, by Dr. F. von Vivenot, pp. 561-563. 



Part II. Report on the Utilization of Peat and Peat Lands, by 

 Frederick A. Paget, pp. 269-349. Mineral Fuel, by W. H. Maw and 

 James Dredge, pp. 353-371. 



Part III. Building Materials at the Vienna Exhibition, by W. H. 

 Maw and James Dredge, pp. 388-407. Iron and Steel, by W. D. 

 Maw and J. Dredge (contains some analyses of ores), pp. 408-518. 

 Civil Engineering, by W. H. Maw and J. Dredge, contains some geo- 

 logical notes of the Mont Cenis tunnel at pp. 554-556. 



Part IV., not geological, published 1874. W. W. 



See also ; — 

 Andrew, T. Mines and Mining in Cornwall and Devon : p. 1. 

 Buckman, J. Cornwall : p. 7. 

 Judd, J. W. Rutland : p. 25. 



Schweitzer, Prof. P. Water Supply of Columbia, Missouri : p. 221. 

 Topley, W. Weald, Economic Geology : p. 40. 

 Worth, Dr. H. Economic Aspects of Trans-Indus Salt Region: 

 p. 143, under Wynne. 



FManv papers that refer to the practical application of geoIog>', and to the 

 occurrence of coal, metalliferous ores, &c., are noticed under Stkatighaphical 

 Geology.] 



