Scientific Intelligence — Miiicralojij and Chemistnj. 183 



15. Cahtron-haryte. — Sometime ago Dr Sheppard, Professor ot" 

 Chemistry in the Medical College of South Carolina, described as a 

 new species, a mineral he named Cahtron-haryte. On analysis it 

 afforded sulphate of barytes 65.55, carbonate of strontia 22.30, car- 

 bonate of lime 12.15. Recent specimens of this mineral have been 

 carefully examined by the Professor, with results so various in re- 

 gard to the carbonates present, as to lead him to consider it a me- 

 chanical mixture of sulphate of barytes, strontianite, and carbonate of 

 lime, and, therefore, not entitled to be considered as a new mineral 

 species. The same appears to be the case with the Stromnite, a 

 mineral found near Stronmess, in Orkney, analysed and named as a 

 distinct species by the discoverer, Dr Traill. 



16. Discovery of Euchme in Connecticut, North America — This 

 rare and beautiful gem is found in a vein containing topaz and fluor- 

 spar. It occurs in yellowish white tabular crystals, which are thin 

 and transparent. The crystals sometimes occur lining cavities in silver 

 white mica, and occasionally imbedded in dark purple fluor-spar — 

 SilUmati's American Journal, vol. xliii., p. 366. 



17. New locality «f Geokronite. — This mineral, of which we gave 

 Svanbcrg's analysis and description in the 33d vol. of this Journal, 

 p. 204, has been found at Mercdo, in Gallicia. The variety resembles 

 the Swedish one, but has a greater specific gravity (= 6.43), and 

 contains neither Arsenic nor Zinc. According to Sauvago {Annalcs 

 des Mines, xvii. p. 525), it is; composed of lead, 64.89 ; copper 

 1.60; antimony, 16.00; and sulphur, 16.90. {Bcrzelius' Jahres- 

 Bericht, xxi. Jahrtjamj, iid Ucft, p. 185.) 



18. Greenovite. — Under this name Dufrenoy (Annales den Mines, 

 xvii. p. 529), has desciibed a mineral from St Marcel, in Piedmont, 

 which he has thus dedicated to Mr Greenough of London. It is of 

 a dark rose-red colour ; is partly crystalline, partly crystallized ; has 

 three cleavages, of which the second is parallel to the lateral planes, 

 and forms, with the others, an angle of 11° 35'. The specific 

 gravity = 3.44. It scratches fluorspar, but not glass. It is not 

 acted on by acids, and is not fusible before the blowpipe. With 

 fluxes, however, it affords the reactions denoting titanium and man- 

 ganese. According to the analysis of Cacarrie, it consists of 74.5 

 titanic acid, and 21.8 oxide of manganese, with traces of lime. 

 (Berzelius' Jahres-Bericht, xxi. p. 180.) 



19. Blue Colour of Lapis Latuli. — Eisner has made some experi- 

 ments on the blue colour of the Lapis Lazuli, and has ascertained 

 that it Is caused by a silicate of alumina and soda, which may be 

 replaced by lime, combined with a double sulphurct of sodium and 

 iron, in which the amount oi' iron is very small, buL is essential f.r 



