74 Scientific Intelligence. 



forms. The crystals are twins, formed of six biaxial sectors. It 

 is associated with ouvarovite and chromite. Hardness = 2, spe- 

 cific gravity = 2-69. An analysis by W. H. Melville gave: 

 SiO.r Cr 2 a A1,0 S FeO MO MgO CaO H 2 



31-74 11-39 6-74 1-23 0-49 35-18 0-18 12-69 a 0-36 b = 100-00 

 a Above 105° »>At 105° 



The result is interesting as showing a much larger percentage of 

 chromium than has before been noted. — Proc. Cat. Acad,. Sci., 

 II, i, Dec, 1887. 



14. Materialien zur Miner alogie Husslands von N. vox Kok- 

 scharow. Vol. x, pp. 1-96. St. Petersburg, 188S. — The vet- 

 eran Russian mineralogist, whose labors for science received so 

 cordial a recognition a year ago, on the occasion of the 50-year 

 anniversary of the commencement of his active service, has re- 

 cently published the opening portion of the 10th volume of his 

 Russian Mineralogy. The species treated of are clinochlore and 

 kotschubeite, which receive an exhaustive revision, and in addi- 

 tion an extended abstract is given of the article on the remark- 

 able meteorite of Nowo-Urei, by M. v. JerofeiefF and P. v. Lat- 

 schinoff. 



] 5. Der Meteorit von JVowo - Urei, von M. Jerofeieff und P. 

 Latschixoff in St. Petersburgh. — This meteorite, which fell Sep- 

 tember 22, 1886, near the village Nowo-Urei, Government of 

 Pensa, Russia, is unique in containing carbon in the form of dia- 

 mond. Three stones were known to fall, of which two were 

 found. The external appearance did not differ from ordinary me- 

 teoric stones, and on the fracture they appeared of a dark gray 

 color, and showed the presence of the chief constituents, olivine, 

 augite and nickeliferous iron. In the course of the analysis, from 

 2 to 2-5 per cent of the material taken remained unattacked by 

 acids, and of this, 60 per cent was amorphous carbon and 40 per 

 cent resisted fusion in bisulphate of potash. The residue was in 

 the form of light gray grains; it proved to consist of 89*6 carbon 

 and 10*4 per cent ash, and had a specific gravity of 3"1 ; the hard- 

 ness was sufficient to scratch corundum readily. It was conse- 

 quently concluded that the substance must be ordinary diamond 

 or the massive form carbonado. An analysis of the whole stone 

 crave : 



Fe(Xi) Cr,0 3 Fe 7 S 6 C Silicates 



5-47 0-95 0-43 2"26 90-76 = 99-87 



The diamond-like carbon made up about 1 per cent of the whole. 

 The silicates consisted essentially of olivine and augite in the ra- 

 tio of 67'5 to 23*8. In amount of carbon this stone is exceeded 

 only by that of Orgueil, which gave 4*1 per cent in form of a 

 humus substance. As regards the occurrence of the carbon in 

 the diamond form, the only related cases are those of the Arva 

 iron, in which Haidinger found cubic crystals of a graphitic sub- 

 stance with apparently pyritohedral planes, and which Rose sug- 

 gested might be pseudomorphs of graphite after diamond ; and 

 the related graphitic mineral cliftonite, from the meteoric iron of 

 Youngdegin, W. Australia, recently described by Fletcher (this 

 Journal, xxxiv, 232, 1887). 



