1825.] Orient l/ic Notices — MiscelhneoUf. 315 



'Wachtnieister considers it a compound of 1 atom of bisilicate 

 of soda + 2 atoms of silicate of alumina. His results differ 

 materially from the analyses of sodalite which have been made 

 both by Borkowsky and Arfwedson ; and on comparing his 

 mineral with the specimen analyzed by the latter chemist, he 

 observed several discrepancies between them, both in their 

 external appearance and in their blowpipe characters. — (Kong-. 

 Vet. Acad. Hand. 1823, p. 131.) 



3. Notice respecting the Discover ij of a Black Lead Mine in 



lnve>)iess'shire. 



The only mines of black lead which have hitherto been wrought 

 in Scotland are those of Cumnock, in Ayrshire, and of Glen- 

 strathfarrar, in the county of Inverness.* This last mine was 

 discovered so recently as 1816, but does not seem to have been 

 wrought to any extent. 



Under such circumstances, therefore, it is with great satisfac- 

 tion that we announce to our readers the discovery of another 

 black lead mine in Inverness-shire, on the property of Glengary. 

 The mine is situated near the top of a rocky ravine, close to 

 the head of Loch Loch^-, on the south-east side, and within a 

 mile of the Caledonian Canal. The mine is so situated that an 

 artificial trough or slide, of simple construction, like that one 

 used at Alpnack in Switzerland for timber, might be erected to 

 convey the black lead ore by its own force of descent from the 

 mine to the Caledonian Canal. 



The breadth of the vein is in many places, where it crops out, 

 fully three feet in breadth. 



Not more than a ton or two of ore has been yet taken from the 

 mine, and that too merely gathered from the surface. — (Edin- 

 burgh Journal of Science.) 



Miscellaneous. 



4. New Work on Fossils. 



We have the pleasure to announce the appearance of the first 

 centur)' of tlie Icones J'\j.\siliii/u Sectiles, by Charles Konig, Esq. 

 of the British Museum. This work will be found to possess 

 great interest both for the general naturalist and the geologist, 

 and consists of eight folio lithographic plates, containing exceed- 

 ingly accurate and well-executed figures of 100 species of fOiS- 

 sils, with their descriptions in Latin. Some of the figures are 

 copied from other works, which from their high price or rarity 

 are not within every one's reach : the rest are drawn from nature. 

 The plates are divided by longitudinal and transverse lines into 

 separate compartments, so that the subjects, as the name of the 

 work implies, may be cut out, and arranged in orders and 



• Black lead has been found in Glen-Ely «nd Shetland. 



