74 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 58 



ENGLAND (Continued) 



405. . On the metalliferous deposits of Cornwall and Devon. 



Trans. Roy. Geol. Soc. Cornwall, Vol. 5, 1843, Penzance. 



Treats of the quantity of tin mined in Cornwall and Devon; the form, displace- 

 ment, and segregations of ore in the veins; the characteristics of tin veins in 

 granite, slate and elvan; stream tin, wood tin and ordinary lode tin; and the 

 minerals associated with cassiterite in the different country rocks. 



406. . On a remarkable deposit of tin-ore at the Providence mines 



near St. Ives, Cornwall. 



Trans.' Roy. Geol. Soc. Cornwall, Vol. 7, 1865, Penzance, pp. 179-184. 



London, Edinburgh, Dublin Philos. Mag. Journ. Sci., ser. 4, Vol. 4, 1852, London, 

 pp. 538-541. 



The Providence mines, in the parish of Lelant, comprise mines formerly known 

 as Wheal Speed, Wheal Laity, Wheal Comfort and Wheal Providence. Observations 

 on the eastern workings in the slate and on the western within the granite forma- 

 tion, have already appeared in Trans. Roy. Geol. Soc. Cornwall, Vol. 5, Penzance, 

 pp. 16-20. The intermediate tract now described is wholly granite. 



407. . Observations on the metalliferous deposits of Cornwall. 



Journ. Roy. Inst. Cornwall, Vol. 4, 1871-1873, Truro, pp. ix-xxxix. 

 Reprinted with alterations and additions in Rep. Proc. Min. Ass. Cornwall and 

 Devon, 1872-1873, Truro, pp. 1-20. 

 General description of veins of Cornwall, including tin-veins. 



408. . On the detrital tin ore of Cornwall. 



Journ. Roy. last. Cornwall, Vol. 4, 1871-1873, Truro, pp. 191-254. Read, May 16, 

 1873. 



Abstracts: Geol. Mag. 1873, London, pp. 317-319; 1874, pp. 177-178. 



Abstract translated by Zeiller, Ann. Mines, 7th ser. Vol. 6, 1874, Paris, pp. 

 114-130. 



Contains summary of observations made at intervals during 45 years. 



Four districts treated : 



1. From Land's End to the eastern sources of Hayle River. 2. Included between 

 the Camborne, Crowan, Wendron and Constantine granite, and the eastern tribu- 

 taries of Restronguet, a creek of Falmouth. 3. Bounded on west by Truro River 

 and the Gannel, on east by Fowey and lower part of the Camel. 4. From eastern 

 part of third district to Tamar. 



. See Nos. 1327 and 1656. 



409. HILL, J. B. Mining in southern district (Cornwall and Devon). 



Sumrn. Progr. Geol. Surv, United Kingdom for 1902 (1903), London, pp. 38-40. 



Although areas surveyed have been extensive mining districts, few mines are 

 still active. Tin streaming in original sense of the term, is practically a thing 

 of the past. Mines operated with modern machinery. Last few years the debris 

 from mine burrows have been put under stamps, more especially those mines 

 originally worked for copper. 



410. . The plutonic and other intrusive rocks of W. Cornwall in their 



relation to the mineral ores. 



Trans. Roy. Geol. Soc. Cornwall, Vol. 12, 1905, Penzance, pp. 546-615. 

 Tin always found in minute quantities in lithia micas, and except in lepidolite, 

 copper also. Favors first deposition by ascending meteoric waters. 



411. HILL, J. B., and MACALISTER, D. A. Geology of Falmouth and Truro and 



of the mining district of Camborne and Redruth. 



Mem. Geol. Surv. Great Britain, 1906, London, pp. 113-314, figs. G4. 

 Extracts: Min. World, May 11, 1907, p. 598; May 18, 1907, p. 626; June 1, 1907, 

 p. 691. 

 Geology of districts is treated with particulars relating to the mines. 



