418 Scientific Intelligence. 



Furnace, N. J. Named after Mr. C. S. Bement, of Philadelphia. 

 — G. A. Kbnig in Proc. Acad. .Wat. Sci., Philad., 1887, 311. 



Dihydro-thenardite. — A sodiuni sulphate containing two 

 molecules of water. It forms a thin bed on the shores of Lake 

 Gori, Tiflis, Russia, and crystallizes in the monoclinic system. — 

 Markownikoio in Per. Chern. Ges., 1887, 546 (J. Russ. phys. ch., 

 Ges.). 



Fiedlerite, Laurionite. — Two related minerals found in the 

 old lead slags of Laurion, Greece, and produced by the action of 

 the sea- water upon them during the past 2,000 years. Laurionite 

 occurs in white prismatic crystals (orthorhombic) not far from 

 mendipite in angle. Hardness, =3-5. Composition, Pb(OH) 2 . 

 PbCl 2 ; an analysis by Bodewig yielding : 



Pb 79-38 3-17 0113*77 H 2 3-68 = 100 



Fiedlerite is related in composition, but no analysis has been 

 given. It occurs in minute tabular monoclinic crystals, in part 

 twins. — G. vom Path in Sitzungsber. Nied. Ges. Ponn, June 6, 

 1887; Kbchlin in Ann. Mm. Wien, vol. 2, 185, 1887. 



Laubanite. — A zeolite resembling stilbite from the basalt near 

 Lauban, Silesia. Occurs in fine fibrous radiated aggregates, 

 sometimes spherical, of a snow-white color. Hardness, 4 "5-5 ; sp. 

 gravity = 2-23. Analysis gave : 



Si0 2 47-84, A1 2 3 16-74, FeO 056, CaO 16-17, MgO 1-35, H 2 17-08 = 99-76 

 This corresponds to 2CaSi0 3 + Al 2 (Si0 3 ) 3 + 6H 2 0, which is not far 

 from laumontite. — H. Traube in Jahrb. 31m., 1887, vol. ii, 64. 



Marti nite. — Occurs as a pseudomorph having the form of 

 gypsum in the guano on the island Curacoa. In white or yellow- 

 ish aggregates of colorless microscopic rhombohedrons. Sp. 

 gravity, 2'894. Analysis gave : 



P 2 5 47-67 CaO 46-78 H 2 4-52 Organic 0-75 Insol. 0-2 0=99-92 



The formula suggested is 2Ca 3 (P0 4 ) 2 + 4CaHP0 4 + H 2 0.— J. H. 

 Kloos, Jahrb. Min., 1888, vol. i, 41 ref. 



Metalonchidite. — A mineral from the St. Bernhard mine near 

 Hausach in Baden. It is essentially a variety of marcasite, agree- 

 ing with it in form and characterized by the presence of 2*7 p. c. 

 of arsenic with some nickel and lead, thus approximating closely 

 to Breithaupt's lonchidite. — Sandberger in (Est. Zeitschr. Perg- 

 Hutt., xxxv, 1887. 



9. Note on Xanthitane ; by L. G. Eakhsts (communicated.) — ■ 

 Through the kindness of Mr. VVm. Earl Hidden, Prof. Clarke has 

 lately received some fine specimens of Xanthitane, first described 

 by C. U. Shepard, this Journal, 1856, vol. xxii, p. 96, which were 

 turned over to me for examination. The material is from Green 

 river, Henderson Co., N. C, and is undoubtedly an alteration 

 product of sphene — following the form very closely. It is light 

 yellow, friable and mixed with impurities which cannot be re- 

 moved, preventing the determination of whether or not it is a 

 definite mineral, but it is interesting from the fact that it appar- 

 ently represents a clay with the silica replaced by tituiic oxide. 



