240 MINEKALOGY. 



Lasaulx, a. von. [Pseudomorphs &c.] N. Jahrb. Heft i. pp. 164- 

 169. 



Letter describing pseudomorphs of dolomite after calcite in tabular 

 forms (oo P.OP), from the Fricdrich Mine, in the Stahlberg, nearMiisen, 

 and the occurrence of fibrous quartz in the same locality. P. W. 11. 



. IJcber den Ardennit. N". Jahrb. Heft iii. pp. 276-278. ' 



Reply to M. Pisani's criticism of the author's analysis of the new 

 species Ardennife \_Dewalquite]. Explains the discrepancy by assuming 

 that arsenic acid replaces vanadic acid in diiFerent specimens of this 

 mineral. P. W. R. 



Laspeyees, H. [Iridescent quartz.] N. Jahrb. Heft i. pp. 49-61, 

 Heft iii. pp. 261-265. 



Letters on specimens of iridescent quartz from Oberstein. Laspeyres 

 was led to their discovery by Yom Bath's description of an Indian spe- 

 cimen in the British Museum. P. W. R. 



. Amethyst-Zwillinge mit der trigonalen Pyramide "j von 



Oberstein an der Nahe. Zeitsch. deutsch. g«ol. Ges. Bd. xxvi. 

 Heft 2, pp. 327-341, with plate (crystals). 

 Specimen from a geode from Oberstein exhibited twins of amethyst 

 made up of R.— R variously developed, rarely with oo R, very fre- 

 quently with the pyramid P2, and in one case with a trigonal 

 pyramid ^l F. W. R. 



Lehmann, J. Ueber den Ettringit, ein neues Mineral, in Xalkein- 



schlussen der Lava von Ettringen (Laacher Gebiet). N. Jahrb. 



Heft iii. pp. 273-275. 



Ettringite is a new mineral from the neighbourhood of the Laacher 



See. It is a hydrous sulphate of alumina and lime, crystallizing in 



the hexagonal system, and occurring in limestone included in lava. 



F. W. R. 



LiLL, Max von. Polyhalit von Stel)nik. Min. Mitt. Heft i. p. 89. 

 Analysis of polyhalite from salt-deposits of Stebnik, in Galicia. 



LiNDSTROM, G. Blomstrandit, ett nytt uranmineral fran Nohl. 

 [Blomstrandite, a new uranium mineral from Nohl.] Geol. foren. 

 Stockholm Forhandl. bdt. ii. pp. 162-164. 

 Analysis given and following formula — R0(Nb205 . Ta^Og . TiO^) + 

 1|H,0. 



LivEESiDGE, Prof. A. Note on a new Mineral from New Caledonia. 

 Journ. Chem. Soc. ser. 2, vol. xii. pp. 613-615. 



This mineral occurs in veins traversing a serpentine rock near 

 Koumea, the capital of New Caledonia. It is an amorphous soft sub- 

 stance, of fine apple-green colour, having a sp. grav. of 2*27. The 

 analysis of this mineral, which is a hydrous silicate of nickel and 

 magnesium, leads approximately to the formula (NiO . MgO)^^ . (SiO^)^ 

 -f 3H3O. Should it be desirable to apply a distinctive name to this 



