Discovenj of the Vauquelinite. 79 



gold mine of Berezof, near Catharineberg in Siberia, where it 

 accompanies the red lead ore. The green mineral found with 

 the red chromate near Cocses in Brazil, may be the Vauque- 

 linite. 



My motive for so long postponing an announcement of the 

 discovery of this mineral in the United States, was merely a 

 wish to make, first, a careful analysis of it; but I have been 

 unable to do this, from the difficulty of obtaining a sufficient 

 quantity of it for my experiments. After the mine was found 

 not to be productive, the shaft was allowed to fall into ruin, 

 and to become full of water, so that it is impossible to open 

 the mine again without incurring considerable expense. I 

 visited the place last year, for the purpose of exploring among 

 the rubbish about the mouth of the mine, but I found only a 

 few very poor specimens of the ore. A quantity of it was 

 brought to this city some years since, but I have not been able 

 to ascertain what became of it. As it may be several years 

 before a new supply of the mineral can be obtained, I am in- 

 duced to offer this imperfect notice to the Lyceum, hoping 

 that it may induce some of our zealous mineralogists to visit 

 the locality and clear out the shaft. I ought to state in con- 

 clusion, that I have examined the splendid suite of Berezof 

 specimens in the valuable cabinet of our associate Mr. Cramer, 

 and I found his specimens of Vauquelinite to agree in every 

 respect with the Singsing mineral. 



