NO, 2 BIBLIOGR.VPHY OF TIN — HESS 235 



MINING AND MILLING (Continued) 



1658. KuNHARDT, Wheaton B. The practice of ore dressing in Europe. 



School Mines Quart., 1SS4, New York, pp. 103-104. 



Describes calcining, to fissure tough rock, as practiced in tin districts of Saxon 

 Erzgebirge; and roasting, to decompose arsenopyrite in tin ore. 



1659. MacAlister, Donald A. Notes on ore dressing in Cornwall. 



Summ. Progr. Geol. Surv. United Kingdom for 1904 (1905), London, pp. 153-103, 

 fig. 1. 



Present high price of tin makes it probable that some abandoned mines could be 

 profitably worked by modern methods. In early days lodes wore worked for only one 

 of the metalliferous minerals, rest thrown to waste. Can be made to cover cost of 

 mining and dressing if it carries only a little under 1 per cent (22.4 pounds per ton) 

 of " black tin " which generally contains over 90 per cent cassiterite and yields on 

 smelting about 65 per cent of metallic tin. 



1660. Peaece, Richard. Losses in vanning tin ores. 



Mg. Journ. Railw. Comm. Gaz., Vol. 77, 1904, London, pp. 110-117. 

 Gives results of e.xperiments in vanning material containing a known amount of 

 cassiterite. 



. See Nos. 1546 and 1547. 



1661. Phillips, John. Improvements in dressing of tin. 



Mg. Journ. Railw. Comm. Gaz., Vol. 15, 1845, London, p. 184, flg. 1. 

 Explanation of diagram of improved furnace for calcining tin ore. 



Sexton, A. Humbolt. See No. 1361. 



1662. Skewes, Edward. Magnetic separation of tin and wolfram at Gunnis- 



lake Glitters. 



Eng. Mg. Journ., Vol. 76, 1903, New York, pp. 424-425, 700 words. 



After crashing and separating the concentrates are calcined and then run through 

 the magnetic separator. One magnet picks up the iron oxide made from pyrites, and 

 a second picks out the wolframite. Tin ore sold ranks as best in Cornwall. Yield of 

 tin 0.378 per cent, wolframite 0.72 per cent. 



1663. TAYT.OR, J. On the economy of the mines of Cornwall and Devon. 



Trans. Geol. Soc. London, Vol. 2, 1S14, London, pp. 309-327. 



A general treatise upon the business methods of mines in Cornwall and Devon, 

 including operations of the tin mines. 



1664. Terrell, S. L. The final stages of tin and wolfram dressing. 



Mg. Journ. Railw. Comm. Gaz., Vol. 83, 1908, London, pp. 714-715, figs. 2. 

 " Deals with tin and wolfram after concentration, considering fine and rough con- 

 centrates." 



1665. Thomas, Chas. Tin dressing. 



50th Ann. Rep. Roy. Cornwall Polyt. Soc, 1882, Falmouth, pp. 182-186. Discussion 

 pp. 186-193. 



Treats of methods and improvements that will reduce the waste of tin resulting 

 from dressing. 



1666. Thomas, R. Arthur. On crushing and concentrating at Dolcoath mine, 



Cornwall. 



Trans. Inst. Mg. Met., Vol. 7, 1899, I^ondon, pp. 175-180. Discussion, pp. 180-190. 

 A general description of the treatment of tin ore at the mine; crushing and con- 

 centration, roasting and reconccntration, with accounts of experiments. 



