466 RECORD OF SCIENCE FOR 1887 AND 1888. 



sclirift, 1888, vol. xv, 103. In tbe latter place biortdablite is men- 

 tioned as another new mineral from the same region but not described. 

 Barysil. — A new load silicate from the Harstig' mine, Pajsberg, Swe- 

 den. It is referred to the hexagonal system, has basal cleavage, white 

 color, hardness equal to 3, and a specific gravity of C.ll to 6.55. An 

 analysis afforded : 



SiOi ri)0 MnO FeO CaO MgO Ign. 



16.98 77. HI 3.49 0.16 0.41 0.58 0.06=100.12 



The formula is accordingly 3PbO. 2Si02. It occurs in iron ore with cal- 

 cite, yellow garnet, tephroite, and galena. The name has reference to 

 its high specific gravity. (Described by A. Sjogren and Luudstrom in 

 the (Efversigt Vet. Akad. Forhandlingar, 1888, xlv, 7.) 



Belonesife. — The study of a mass of aucient volcanic rock enveloped 

 in the Vesuvian lava of 1872 has led to the discovery of two species to 

 which Scacchi has given the names belonesite (belonesia) and cri- 

 phiolite (crifiolite). Belonesite, as the name suggests, occurs in needle- 

 like crystals. These are white and transparent, and are referred to the 

 tetragonal system. The material was iusufiQcient for an analysis, but 

 qualitative tests led to the conclusion that it is a molybdate of magne- 

 sium. 



GripMolite occurs in small tabular crystals belonging to the mono- 

 clinic system. They are covered by apatite so as to be concealed by 

 it, whence the name given to the species. The color is honey-yellow; 

 the specific gravity 2.674. An analysis gave: r.O;, 48.91, MgO 33.58, 

 CaO 14.60. Loss 2.01 = 100. The examination showed that tluorine 

 was probably present, and the amount is estimated as nearly equal to 

 7 per cent. The mineral is hence near wagnerite in composition. 

 (Described by A. Scacchi in Mem. Accad. Napoli, 1887, vol. i. No. 5.) 



Bemenflte.—A new manganese silicate from the prolific locality at 

 Franklin Furnace, New Jersey. It occurs in stellate aggregations, 

 having a foliated structure and in aspect closely resembling somepyro- 

 phyllite. The color is a pale grayish-yellow; it is soft and friable; the 

 specific gravity is 2,981. An analj'sis yielded : 



H20 



100 



This yields the formula 2(H2,Mn)0,Si02. It is found that the water goes 

 off at a temperature above 200°. Bementiteis named after Mr. Chirence 

 S. Bement, of Philadelphia, by G. A. Koenig. (Proceedings Acad. JSTat. 

 Sci., Philadelphia, 1887, ]). 311.) 



Beryllonite. — A new beryllium phosphate from Stoneham, Maine. A 

 preliminary description announces that it occurs in colorless crystals 

 and cleavage fragments. The crystals are highly modified, and belong 

 to the orthorhombic system, with a prismatic angle of about 120°. The 

 hardness is 5.5 ; the s[)ecific gravity 2. A qualitative analysis by H. L. 

 Wells shows it to be an anhydrous phosphate of beryllium and sodium. 



