360 Scientific Intelligence. 



The rest includes TiO„ 1-35; MnO -40; P 2 0^ -58; S0 3 -99; CI 88. 

 The rock is evidently closely related to alnoite, but differs in the 

 lack of pyroxene and olivine. — J. Soellner, Mitt. d. G. Bad. 

 Geol. Lndanst., vii, p. 415, 1913. l. v. p. 



18. Brief notices of some recently described Minerals. — Mau- 

 chebite is a nickel arsenide from Eisleben, Thuringia, Germany; 

 it was described (1913) by F. Grunling and named after the dis- 

 coverer, W. Maucher. Associated minerals are niccolite, chloan- 

 thite, bismuth, manganite, calcite, barite, etc. It occurs in 

 masses having a compact or indistinct fibrous structure, and red- 

 dish silver-white color ; also in rectangular tabular crystals. 

 Hardness 5; specific gravity 7*83. An analysis by Prandtl gave: 

 As 43-67, S 0-17, Ni 52-71, Co 2-15, Pb 0-20, Fe 0*40, gangue 

 0-40 = 99-70. This yields the formula (Ni,Co) 3 As 2 . — Centralblatt 

 Min., p. 225, 1913. A later investigation by A. Rosati has 

 proved that the crystals are tetragonal and that the substance is 

 identical in composition with the artificial furnace product called 

 " nickelspeise " (placodin of Breithaupt). — Zs. BTryst., liii, 389, 

 1914. 



Hodgkinsonite is a new zinc-manganese silicate from Frank- 

 lin Furnace, N. J., described by C. Palache and W. T. Schaller. 

 It occurs in seams in a granular mixture of willemite and frank- 

 linite. Crystals are rare; these are monoclinic in form with per- 

 fect basal cleavage. The hardness is about 5 ; specific gravity 

 391 ; color from bright pink to pale reddish brown. An analysis 

 (Schaller) gave : 



Si0 2 MnO ZnO CaO MgO H 2 (above 110°) 



1986 20-68 52-93 0-93 0-04 577 = 100-21 



The formula deduced is Mn(ZnOH) 2 Si0 4 . — Journal Wash. Acad. 

 Sci., iii, 474, 1913. 



Yukonite is a new hydrous iron-calcium arsenate from Tagish 

 Lake, Yukon, Canada ; it is described by J. B. Tyrrell and R. P. 

 D. Graham. It occurs in black or brownish black irregular con- 

 cretionary masses in a quartz vein with galena and other sulphides. 

 Structure amorphous; brittle with conchoidal fracture; hardness 

 2-3; specific gravity 2-65 becoming 2-86 after being long im- 

 mersed. The mineral flies to pieces in water with a crackling 

 sound and the disengagement of gas (chiefly CO„). Two analyses 

 (Graham) gave: 



As 2 5 Fe 2 3 CaO H 2 



34-06 35-72 10-00 20'28 



33-83 36-81 10-14 20-28 



The calculated formula is 2Ca 3 As 2 O e .3Fe 2 As 2 8 .5Fe 2 (OH) 6 . 

 23H 2 0. It is somewhat related to arseniosiderite and mazapilite. 

 — Trans. Boy. Soc. Canada, vii, section iv, 1913. 



Epidesmine, described by Rosicky and Thugutt, is a new zeo- 

 ite occurring in minute colorless to pale yellow crystals from 



