252 MINERALOGY. 



of silicate remain, 6-8 mm. long ; in others they have been covered by 

 the carbonate, which has grn dually replaced their substance, though the 

 tabular form of the crystal remains. E. B. T. 



Navia, Severe. Observaciones sobre los Caracteres (jue presentan 



tratados al soplete los Minerales de Plata y sobre las Pegaduras que 



producen algunas ligas binarias de este Metal, sometiendolas al 



mismo tratamiento. [Blowpipe Characters of Silver Ores and 



Alloys of Silver.] Naturaleza, t. iii. no. 10, pp. 194-202 ; coloured 



plate. 



Describes the characters presented by the various silver-ores when 



heated on charcoal before the blowpipe, and illustrates the incrustations 



on charcoal produced by various binary alloys of silver. F. W. E. 



Neminar, E. F. Ueber die chemische Zusammensetzung des Mejonits. 

 [Chemical Composition of Meionite.] Min. Mitt. Heft ii. pp. 51-56. 



Transparent crystals of Vesuvian Meionite, crystallized in the 

 common combination ocPoc . P . coP, were separated from adhering 

 minerals ; and two analyses were made, leading to the following 

 empirical formula : — 



26SiO, . 11 Al,03 . 14CaO . Na^ . 2H,0. 

 This formula cannot be simplified, as the lime is not isomorphously 

 replaced by soda and potash. The author regards the water as essential 

 to the constitution of the mineral ; hence Meionite should be removed 

 from the group of anhydrous silicates. P. W. R. 



. Minerale aus dem nordwestlichen Theile Schlesiens. [Silesian 



Minerals.] Min. Mitt. Heft ii. pp. 110, 111. 



Notices the occurrence of Titanite near Priedberg, in a rock con- 

 sisting of orthoclase, quartz, and decomposed diallage; also found 

 tremolite near Priedberg, both occurrences being new. Albite is found 

 at Schwarwasser.' P. W. Ii. 



Minerale aus dem siid-ostlichen Theile Schlesiens. [Minerals 



from S.E. Silesia.] Min. Mitt. Heft iii. pp. 207, 208. 

 The minerals are spherosiderite, pyrites, bog-iron-ore, and earthy 

 vivianite. 



. Ein neuer Pundort von Beryll. [New Locality for Beryl.] 



Min. Mitt. Heft iii. p. 208. 



Beryls were found in the granite of Neumarkt near Preidstadt, in 

 Upper Austria. The crystals are prismatic, 4 to 5 centims. long, and 3 to 8 

 millims. in diameter. They are often fractured, and the fissures filled 

 with quartz or mica, proving that the rocks have suffered disturbance 

 since the crystallization of the beryl. P. W. R. 



Niederstadt, Dr. B. C. Estremadura Phosphorite. Chem. News, 

 vol. xxxi. p. 144. 



Complete analyses of 4 samples of impure phosphorite from the 

 neighbourhood of Logrosan in Estremadura. The percentage of phos- 

 phoric acid varies from 26-6 to 29-6. P. W. R. 



