Geology and Mineralogy. 71 



Kamarezite, described by K. Busz, is a hydrated copper sul- 

 phate from Laurion, Greece. It occurs in crystalline masses, 

 showing minute tabular crystals. Hardness 3 ; specific gravity 

 3*98; color grass-green. An analysis gave: 



S0 3 17-52 CuO 51-50 FeO 0-69 H 2 30-29 = 100. 



Formula calculated (CuOH) 2 S0 4 . Cu(OH) 2 + 6H 2 0. — Jahrb. 

 Min., i, 115, 1895. 



Lossenite is another mineral from Laurion, Greece, for which 

 the complex formula 2PbS0 4 . 3(FeOH) 3 As 2 8 + 12H 3 is 

 deduced by L. Milch. It occurs in acute pyramidal crystals 

 related to scorodite in form and of a brownish red color. An 

 analysis gave : 



A 2 5 S0 3 PbO Fe 2 3 H 2 (comb.) H 2 Si0 2 CaC0 3 



33-44 374 10-63 34'53 3"74 11-81 1*13 1-46 = 100-48. 



— Zeitschr. Kryst., xxiv, 100, 1894. 



Lewisite, described by E. Hussak and G. T. Prior, is a mineral 

 from the cinnabar mine of Tripuhy, Ouro Preto, Brazil. It 

 occurs in minute regular octahedrons of a honey-yellow to colo- 

 phony-brown color. Hardness 5*5; specific gravity=4'95. The 

 composition is expressed by the formula 5CaO . 2Ti0 2 . 3Sb 2 6 , 

 which was deduced from the analysis : 



Sb 2 5 Ti0 2 CaO FeO MnO Na 2 



67-52 11-35 15-93 4*55 0-38 0-99=100-72. 



— Mineral Magazine, xi, 80, 1895. 



Mauzeliite is another titano-antimonate of calcium related 

 to lewisite and described a little earlier by H. Sjogren. It is also 

 found iu isometric octahedrons of a dark brown color. Hardness 

 6-6-5, specific gravity 5*11. The mean of two analysis by R. 

 Mauzelius gave : 



Sb 2 5 Ti0 2 PbO FeO MnO CaO MgO K 2 Na 2 F H 2 



59-25 7 93 6"79 0'79 1'27 17-97 O'll 0'22 270 [3-63] 0-87 = 101-53. 



It occurs with svabite and calcite at Jakobsberg, Sweden. — Geol. 

 For. Fork., xvii, 3 J 3, 1895. 



Tilasite is a mineral related to adelite but containing fluorine; 

 it is described by H. Sjogren from Langban, Sweden. It is 

 found in granular masses of a gray color and resinous luster. 

 Specific gravity 3-28. The composition is (CaF) MgAs0 4 deduced 

 from the analysis by Mauzelius : 



As 2 5 P 2 5 FeO MnO CaO MgO Na 2 H 2 F CI 



60-91 tr. 0-14 0-16 25-32 18-22 0"29 0"28 8-24 0-02 = 103-58. 



— Geol. For. Fork., xvii, 291, 1895. 



Zirkelite is a rare zirconium mineral described by E. Hussak 

 and G. T. Prior from the locality Jacupiranga in Brazil, which 

 has afforded the new species baddeleyite (Zr0 2 ), also perovskite, 

 etc. It occurs in regular octahedrons of a black color. Hardness 

 5*5; specific gravity 4-706. An analysis gave: 



