460 Intelligence and Miscellaneous Articles. 



given the annexed tabular view of their composition in the last Num- 

 ber of Dr. Brewster's Journal. 



Tlie specimens were obtained from the following places : (a) Cross- 

 basket, about seven miles south-east from Glasgow. Sp. gr. 3" 1/93. 

 (6) Ditto. Sp.gr.. 3-3801. (c) Ditto. Sp. gr. 3-2699. (d) Ditto. 

 Sp. gr. 3-1 1/5. (e) Near the Clyde Iron Works, about four miles 

 south-east from Glasgow. Sp. gr. 3-1482. (/) Ditto. Sp. gr.3-2109. 

 {g) Easterhouse, near the line of the Monkland Canal, and about .six 

 miles east from Glasgow. Sp. gr. 3-3109. {h) Neighbourhood of 

 Airdrie, about ten miles from Glasgow. Sp. gr. 30553. (i) Vicinity 

 of Crossbasket. — Edinburgh Journal of Science, Oct. 1827. 



BERTHIERITE, — A NEW MINERAL SPECIES. 



The following is extracted from Mr. Haidinger's account of this 

 substance. 



The Berthierite is an ore of antimony in the oeconomical acceptance 

 of the word ; as it consists of four atoms of sulphuret of antimony, 

 and of three atoms of protosulphuret of iron, the antimony being com- 

 bined with twice as much sulphur as the iron. It occurs at Chazelles, 

 in Auvergne, in a vein which promises to be very productive. It had 

 been worked for some time, but was again abandoned on account of 

 the bad quality of the antimony extracted. M. Berthier has imagined 

 the following process, by which the metal obtained becomes perfectly 

 pure. The mineral, without previous roasting, is to be melted with 

 about one-third, or a little less, of its weight of metallic iron, to which 

 is added a small quantity of sulphate of soda mixed with charcoal. 



In regard to its external appearance, Berthierite much resembles 

 some of the other species of the genus antimony-glance, as the com- 

 mon gray antimony, and the Jamesonite, and also the zinkenite. It 

 occurs in elongated imbedded prisms, with a single pretty distinct 

 longitudinal cleavage. Its colour is a dark steel-gray, inclining to 

 pinchbeck-brown, with a metallic lustre. These properties are not 

 sufficient to characterize the mineral, and a further account is promised. 



, l^id, STEHNBERGITB. 



I 



