Miiii.'ralvg!/. SSS 



to thin fragments by pouring it, when in fusion, into cold 

 water. 



To the enlightened chemist we need not point out the ex- 

 periments suggested by this new and curious fact, and the 

 important results to which it may ultimately lead. If cop- 

 per and tin, by a mere difference in the temperature of the 

 solution, may be made mutually to precipitate each other, it 

 is not impossible that the order of affinities with respect 

 to other metals for the different acids may also be inverted 

 by circumstances connected with temperature. Should any 

 such results be obtained, they will be productive of incalcu- 

 lable advantages in many intricate cases of analysis. The 

 different results obtained in apparently similar experiments, 

 by equally accurate chemists, may perhaps have been owing 

 in some cases to the existence of such a law as we now 

 allude to. 



MINERALOGr. 



Dr. Aires, from New Jersey, who has lately explored se- 

 veral of the western counties of the State of North Carolina, 

 in search of gold, reports, that he has discovered gold in 

 branches and creeks in the counties of Cabarrus, Mont- 

 gomery, and Randolph, in a north and north-east course, 

 and in the county of Mecklcnburgh, in a south and south- 

 west direction from the first sound, where none had ever 

 been discovered before, except in three or four branches 

 near Reed's (the first discovery) in Cabarrus county. A few 

 pieces of gold, intermixed with stone, have been found on 

 ibe surface of the earth, and some ploughed up in most of 

 the said counties. Several of the said vv^ater-courses contain 

 considerable quantities of gold dust, which can be collected 

 by washing the sand, after the first or common washing, with 

 a machine proper for the purpose, and then by mixing mer- 

 cury with the sand thus washed, which will unite with the 

 particles of gold, and form an amalgam, whence the mercury 

 iiuiy be driven off by heat. 



A copper mine has been discovered on the estate of Hans 

 Hamilton, esq., in the county of Dublin, which promises 

 to be very productive. A company has been formed, and 

 are already engaged in carrying it on. 



TRAVELS. 



