1825.] Scientific Notices — Mineralogy. 153 



repeatedly sublimed ; but when highly heated, iodide and sul- 

 phur are set free, sulphurous acid is formed, and a mixture of 

 antimony and oxide produced. The crystals have a sharp disa- 

 greeable taste : light has no action on them. When put into 

 alcohol or ether, iodine is dissolved, and a yellow sulphuret of 

 antimony deposited. When put into water, hydriodic acid, pro- 

 toxide of antimony, and sulphur, are formed. The action of the 

 acids is such as might be expected, decomposition of the sub- 

 stance being always produced. 



Upon analysis, this substance gave as its elements, antimony 

 23'2, iodine 67'9, sulphur 8-9, which nearly corresponds with 

 one proportional of each substance. The authors have called it 

 a sulpho-iodide of antimony. Jour, de Fharui. — (Journal of 

 Science.) 



Mineralogy. 



8. Yenite found in the United States. 



Dr. Torrey states, that a mineral has been found at Rhode 

 Island, which, from its characters, he considers as yenite. It 

 is in small crystals imbedded in an aggregate of quartz and 

 epidote. The crystals vary in size ; the larget^t found was an 

 inch and a quarter long, one quarter of an inch broad, and two 

 lines thick. The terminations were wanting. The form is 

 nearly rectangular ; the surface striated and shining, with a 

 semi-metallic lustre. Cross fracture somewhat resinous. It is 

 imperfectly foliated in the direction of the longer diagonal of the 

 prism. It scratches glass shghtly. It is opaque, and of a 

 blackish brown colour. The powder has the colour of the mass. 

 Specific gravity 3*6. 



Before the blowpipe, it melts with great ease into a black 

 opaque glass, strongly attracted by the magnet.— (Annals of 

 Lyceum of Natural History, New York.) 



9. Localities of rare Minerals. 



Chrome ore, the chromate of iron, has been discovered by Sir 

 Humphry Davy in small graiiular masses, disseminated in a 

 greenish-white marble from Buchanan, in Stirlingshire, pre- 

 served in Mr. Allan's cabinet. Of the Cronstedtite, of Stein- 

 mann, a mineral hitherto confined to Przibram, the same collec- 

 tion contains specimens from Wheal Maudlin, in Cornwall. 

 The cronstedtite from the latter locality presents generally 

 thinner individuals than the Bohemian one, but is, like this, 

 accompanied by sparry iron and hexahedral iron pyrites. 

 Another product of Wheal Maudlin has lately attracted the 

 attention of mineralogists. The collections of Mr. Allan, Mr. 

 Rashleigh, of MenabiUy, and Mr. Williams, of Scorrler, contain 

 pseudoraoq>hous crystals of wolfram, in the shape of tungstate 

 of lime. They present the form, well known in that species, of 

 an isosceles four-sided pyramid, bevelled on the solid angles 



