1818.] Scientific Intelligence. 453 



Article IX. 



SCIENTIFIC INTELLIGENCE, AND NOTICES OF SUBJECTS 

 CONNECTED WITH SCIENCE. 



I. Black Lead-mine in Glen Straih-Farrar, fyc. 

 Professor Jameson has examined the Black Lead-mine in 

 Glen Strath-Far rar, 22 miles from Beauly, in Inverness-shire, and 

 finds the ore disposed in irregular but. promising masses in gneiss. 

 ■He also met with the cinnamon-stone in gneiss, near Kincardine, 

 in Ross-shire ; and in the same district crystals of apatite 

 imbedded in quartz veins that traverse gneiss. In Ross-shire, 

 Professor Jameson saw that particular variety of granite found 

 in Corsica, and which has been so much noticed by French 

 geologists under the name of orbicular or Corsican granite : and 

 near Drimnadrochit, in Inverness-shire, he observed that rare 

 mineral the anthophyllite. 



II. Ranges of Hills of Iron Ore in Brazil. 



Mr. Engineer Von Eschwege, Director of the Mines of 

 Minas Geraes in Brazil, informs us that the abundance of iron 

 ore in Minas Geraes is extraordinary ; and he questions if any 

 other district on the face of the earth contains so much. The 

 ores are magnetic iron stone, iron glance, iron mica, and com- 

 pact clay iron stone ; and these are disposed not in veins, or 

 single beds, but form whole hills and ranges of hills. 



III. Chromate of Iron in the Feroe Islands. 

 Specimens of chromate of iron have been brought to Edin- 

 burgh, said to have been found in the Feroe islands. We have 

 examined the specimens ; but suspect that they are not the 

 production of Feroe. Probably some of our mineralogical corre- 

 spondents may be able to inform us if there are any other rocks 

 in the Feroe islands, besides those of the floetz or secondary 

 class. 



IV. Account of some new Minerals. By Henry Heuland, Esq. 



(To Dr. Thomson.) 

 DEAR SIR, London, Oct. 8, 1818. 



Finding in your last number of the Annals a short translation, 

 being an extract from a notice by M. Cordier, of Paris, on some 

 minerals which were named by Werner ; and being assured that 

 M. Cordier could not have been possessed of a characteristic 

 specimen when he examined the helvin, I beg to say that its 

 crystalline form is a regular tetrahedron, instead of an irregular 

 octohedron. The helvin, which has been known here many 

 years, is seldom seen in its primitive form, usually presenting 

 the most simple modification— Haiiy's epointc ; its locality is 

 the mine called Brother's Lorenz, in the vicinity of Schwarzen- 

 g in the Saxon Erzgebirg ; and Werner named it from the 

 Greek foioj, sun-yellow. 



