NO. 



BIBLIOGRAPHY OF TIX — HESS 73 



ENGLAND (Continued) 



397. . On some remarkable phenomena attending the lodes of Pol- 



gooth tin mine. 



Tians. Roy. Geol. Soc. Cornwall, Vol. 1, 1818, Penzance, pp. 143-153, pi. 5. 



Description of the tin veins of Polgootli mine, which were observed by author 

 or on which data were communicated to him, in 1791, by Capt. Phillips, director 

 of mine, data being gathered as the working of mine opened it up. 



398. . On the stratified deposits of tinstone, called tin-floors, and on 



the diffusion of tinstone through the mass of some primitive rocks. 



Trans. Roy. Geol. Soc. Cornwall, Vol. 2, 1S22, Penzance, pp. 29-4,S. 



A description of the Cornwall tin deposits known as tin-floors is given, also 

 an account of the form of deposit known in Germany as " stock works " and methods 

 used by Germans in working such deposits. 



399. . Observations on the alluvial strata at Forth, Sandrycock and 



Pentuan. 



Trans. Roy. Geol. Soc. Cornwall, Vol. 2, 1822, Penzance, pp. 285-289. 

 A paper in which the writer gives his views explanatory of alluvials of Porth 

 and Sandrycock. ^Believes in deposition by a flood. 



. See No. 1396. 



Headdex, Wm. p. See No. 1617. 



400. Helmhackeb, R. Allgemeines iiber das Zinnerzvorkommen in Corn- 



wallis, nebst einigen speciellen Beispielen. 



Oest. Zeitschr. Berg. Ilutt., Vol. 27, 1879, Wien, pp. 427-429, 443-445, 458-460, 

 466-470, 473-475, 490-492, 500-508, 509-51], 524-527, 537-538, illus. 



401. Henty, G. M. On the occurrence of wood-tin at the great Wheal Vor 



mines. 



Rep. Proc. Min. \ss. Cornwall and Devon, 1867, Falmouth, p. 55. 



402. Henwood. George. Observations on certain tin stream works in the 



county of Cornwall. 



Mg. Journ. Railw. Comm. Gaz., Vol. 22, 1852, London, pp. G07, 629; Vol. 23, 

 1853, p. 12. A series of three articles entitled the " Carnon," " Nancothan," and 

 the " Bog," respectively treat of stream tin deposits, their situation, appearance, 

 production, antiquities discovered in the course of working, animal and fossil 

 remains, and methods of working. Theories as to the probable sources from which 

 these great deposits were derived. Briefly treats of the character, superstitions and 

 peculiarities of the Cornish miner. 



403. . Four lectures on geology and mining. 



1855, London. 



(1) An introductory lecture, pp. 23; (2) Observations on certain tin stream works 

 in the county of Cornwall, pp. 27; (3) On the metalliferous veins or lodes of Devon 

 and Cornwall, and the methods of mining them, pp. 23; (4) On the manipulation of 

 the ores of Devon and Cornwall, to render them marketable, pp. 21. 



404. Henwood, W(illiam) J(ory). Deposits of stream tin ore in Cornwall 



with remarks on the theory of that formation. 



Trans. Roy. Geol. Soc. Cornwall, Vol. 4, 1838, Penzance, pp. 57-69. 

 Overburden 14 to 53 feet. Gravel containing SnOo, 4 to 18 feet, on granite 

 bnttiini. Believes in diluvial deposition. 



