NO. 2 BIBLIOGRAPHY OF TIN HESS 169 



TASMANIA (Continued) 



1131. SOWDEN, C. To the Tasmanian tin mines. 



Nat. Hist. Journ. School Rep., Vol. 17, 1893, York, pp. 6-8. 

 Digest from Ann. Brit. Geol., 1893, London, p. 347. 

 " A description of the works at Mount Bischoff." 



STEPHENS, D. See No. 59. 



1132. STOKES, RALPH (S. G.). The Tasmanian tin industry. 



Mg. World, Vol. 26, 1907, Chicago, pp. 718-719, 776-777, 806-807. 



A series of illustrated articles giving a general review of the tin industry of Tas- 

 mania. Not much geology is given. 



1133. . Mount Bischoff tin mine, Tasmania. 



Mg. World, Vol. 27, 1907, Chicago, pp. 55-58. Illus. 



General article giving account of the decreased output of Mt. Bischoff tin mine, 

 owing to the working- out of the Brown Face; also a description of the working of a 

 new electric plant. 



. See No. 729. 



1134. TASMANIA. Government geologist. The mineral industry of Tasmania. 



Published quarterly, Compiled by: Harcourt-Smith, J., from 1897 through 

 March, 1899. Wallace, W. II., from June, 1899-. (From June, 1899 to December 31, 

 1901, not available to the authors.) Twelvetrees, W. H., from December, 1901. 



1135. THUREAU, G. Report on the Ben Lomond tin deposits. On the St. 



Paul's River tin deposits, 



Tasm. Parl. Pap. No. 108, 1881, Hobart, pp. 4, plans. 



1136. . The Blue Tier Mining District. 



Geol. Surv. Rep., Tasmania, 1886, Hobart. 

 Not available to the authors. 



TEEGAY, W. See No. 60. 



1137. TWELVETREES, W. H. Report on some tin mines in the St. Paul's River 



valley near Avoca. 



Rep. Seer, for Mines, for 1899-1900, Tasmania, 1900, Hobart, pp. XIV-XXVII, pis. 3. 



Describes the Roy's Hill tin mine as being in Permo-carboniferous " wash and 

 conglomerate " 20 feet thick and overlain by Jura-Trias sandstone. Beneath the 

 deposit is a quartz-mica-tourmaline rock with some kaolin, from which the tin has 

 been derived. Both are worked. Gives an exposition of the theory of pneumatolytic 

 deposition, and advises further prospecting. The St. Paul's mines were at this time 

 idle. They are in much silicified and tourmalinized granite. The cassiterite is well 

 crystallized and often of amber or ruby color. 



1138. . Report on the Arba extended tin sections at Bran'xholm. 



Rep. Seer, for Mines for 1899-1900, Tasmania, 1900, Hobart, pp. XLI-XLIII. 



Prospects are that the tin mines (placer) will be small. The gravel occurs in 

 pockets in a granite which contains considerable tourmaline and many quartz veins. 

 Some gold is found with the tin. 



1139. . Preliminary report on the deep lead or infra-basaltic stannif- 

 erous gravels of the Ringarooma valley near Derby. 



Rep. Seer, for Mines, for 1899-1900, Tasmania, 1900, Hobart, pp. CVII-CXXVII, 

 sketch maps 2. 



Tries to trace the old valley of the Ringarooma River under basalt by which it is 

 covered. The river and tributary streams are known to have flowed through stannif- 

 erous granite so that it is supposed the gravels may pay for working. Where 

 denuded both tin and gold have been obtained from the gravel. 



