ADDENDA. 



337 



und die chemische Constitution der Psilomelane. [The Lithia> 

 psilomelane of Salm Chateau, Belgium ; and the Chemical Con- 

 stitution of Psilomelane.] Journ. praJcf. Chem. F. 2, Bd. xiii. pp. 

 1-28. 

 Finds Lithia in many manganese-ores. Some varieties of psilome- 

 lane are rich enough to be distinguished as lithia-josilonielane. Gives 

 analysis of specimen from Salm Chateau, which yielded 0*468 p. c. 

 of Lifi. Cites various views on the composition of psilomelane 

 generally, and concludes that trustworthy analyses of pure material 

 lead to the formula .x^(H^Me05). Suggests that some varieties may be 

 utilized for the preparation of lithium compounds. The Salm-Chateau 

 mineral also contains vanadium. F, W. K. 



Laspayres, H. Ueber die chemische Constitution der Braunsteine, ein 



Beitrag zur Kenntniss der Werthigkeit des Mangans. [Chemical 



Constitution of " Brown-stones."] Journ. prakt. Chem. F. 2, Bd. 



xiii. pp. 176-215. 



Discusses analyses of the manganese-ores grouped under the general 



name Braunsteine ; and concludes that they may all be regarded a3 



manganates. Much of the memoir is purely chemical. The valency 



of Mn is discussed. F. W. R. 



Die Constitution der aluminiumhaltigen Braunsteine. [Con- 



stitution of Aluminiferous Manganese-ores.] Journ. praJct. Chem. 

 F. Bd. 2, xiii. pp. 215-236. 

 Describes the lustrous psilomelane (GlasTcopfhraunstein) of Kaltebom, 

 near Siegen. It contains 6*472 p. c. of alumina and 0*215 p. c. of 

 lithia. Also describes other manganese-ores which contain alumina^ 



F. \V. R. 



. Ueber die chemische Constitution des Maxit. [Chemical 



Constitution of Maxite.] Journ. praJct. Chem. F. 2, Bd. xiii. 



pp. 370-385. 



Analyses of Maxite confirm the empirical formulae Hj^PbjgCgSjOjg. 



Sp. gr. at 16°= 6*509. Maxite may be identical with Leadhillite, the 



Atater having been overlooked in analyses of the latter, or estimated as. 



CO^. F.W. R. 



Chemische Untersuchungen von Nickelerzen. [Nickel-ores.]' 



Journ. 2yraJct. Chem. F. 2, Bd. xiv. pp. 397-413. 

 The empirical formula R^S, = Ni 59*447, 8=40*553. Cubic clea- 

 vage imperfect. Sp. gr. 4*81. (See p. 234.) 



Liversidge, [Prof.] ArcMbald. Note on a Mineral from New South 

 Wales, presumed to bo Laumontite. Min. Mag. no. 2, p. 64. 



L'Olivier, Victor. Le Nitrate de sonde dans TAmdrique du Sud. 

 [Nitrate of Soda of S. America.] Aim. Chim. Phys. ser. 5, t. vii. 

 ^- pp. 289-318, woodcut. 



Describes the deposits, discusses the origin of the salt, gives analyses^ 

 1876. « 



