152 Additional Notice of Tungsten and Tellurium. 



haviiiff arrived at walking with a stick. He returned this spring 

 — completed his cure in three or four weeks — and danced qua- 

 drilles. 



ADDITIONAL NOTICE OF THE TUNGSTEN AND TELLURIUM 



mentioned in our June Numl>er. 

 Part I. — Description oj" the Ore. 

 Colour, dark brown, ahnost black, brittle ; powder a lighter 

 shade of brown than the mineral, hard, scratches glass, scintil- 

 lates with steel, with a red spark; a degree of polish produced, 

 where the steel strikes, and when the steel is impressed upon it. 



Structure compact, in some places slightly porous ; lustre, ge- 

 nerally dull, sometin)es glimmering, and almost resinous. 



Crystals octahedral. Specific gravity of three massive pieces, 

 5-7, 6, and 6-44 ; mean, t)'05 nearly; probably that of the cry- 

 stals would be higher. 



Infusible by the blow-pipe even with borax, and does not by 

 strong ignition impart any colour to it or to potash; not mag- 

 netic, even in fine powder, not after being heated red hot on char- 

 coal, and in contact with burning grease. 



Many specimens decrepitate violently under the blow-pipe. 

 When heated on coals in pieces of considerable size, they often 

 explode with a smart report, and are thrown in fragments some- 

 times several yards from the fire. 



Gangue quartz ; accompanying minerals in the same vein, na- 

 tive bismuth, native silver, galena, iron, and copper pyrites, 

 much magnetic pvrites, blende, &c. 



Geological Relations. — The country is primitive, and the im- 

 mediate rock which forms the walls of the vein is said to be gneiss. 

 (We have not seen it.) 



Locality; town of Huntington, parish of New Stratford, county 

 of Fairfield, 20 miles west from New-Haven, Connecticut. 



Remark. Native bismuth in small quantities has been for 

 several years obtained from this mine, but the shaft has been sunk 

 only about ten feet. 



Part II. — A Variety of the Ore. 



General character as above ; but on some parts there is seen 

 a whitish, or yellowish, or sometimes darkish metallic substance; 

 it is in thin plates, like the loaf metals, and sometimes reticu- 

 lated, and graphic in its disposition ; it is soft and easily cut with 

 the knife. In the specimens examined, it was so much blended 

 with the other ore, and so trifling in quantity, that it was not 

 possible to separate it mechanically, so as to examine it sepa- 

 rately. 



Part III. — A. Chemical Trials, 



1. Muriatic acid, hot or cold, produces no effect ; hot nitro- 



muriatic 



i 



