lJ>Dl!!ri>Ji. 



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Analysis of a metallic incrustation on lava from the eruption of 

 1874 gave — iron 90-86, nitrogen 9-14, corresponding to Fe^N^. Such 

 a compound had not been previously known native ; and the author 

 suggests for it the name of Siderazote. F. W. R. 



Stoddart, W. W. On the occurrence of Celestine in the Keuper 

 Marls, and its influence on the composition of plants. Min. Mag. 

 no. 1, pp. 4-7. 

 Celestine occurs at Bristol only in the lowest beds of the Keuper 

 marl, and in the marls which fill fissures in the Carboniferous Lime- 

 stone. Analyses are given of concretionary celestine from Clifton, and 

 of the celestine-bearing marl of Cothara. Strontium may be detected 

 spectroscopically in the ashes of many plants growing in the celestine- 

 marls. F. W. R. 



Stodder, Charles. A Contribution to Microgeology. Proc. Boston Soc, 



Nat. Hist, vol. xviii. pp. 206-209. 

 An account of Virginian diatomaceous beds, with a list of fossils 

 from the " Miocene Richmond infusorial deposit." 



Thiirach, Hans. Ueber Beimengungen des MolybdSnglanzes. [Mo- 

 lybdenite.] Journ. praJct. Chem. F. 2, Bd. xiv. pp. 305-309. 

 Finds that all molybdenite contains as a foreign constituent molybdic 

 acid or calcium molybdate. 



Todd, — . ^Mastodon angustidens from Pike County, Mo.] Proc, 



Ac, Sci. St. LouiSf vol. iii. p. cxcii. 

 Note of occurrence. 



" Trautschold, H. Der Franzosische Kimmeridge und Portland 

 g;:^ verglichen mit den gleichaltrigen Moskauer Schichten. [Com- 

 parison of the French U. Jurassic and the similar Moscow Beds.] 

 Bull. Soc. Imp. Nat. Mosc. t. li. pp. 381-392. 

 Comparison by the mollusca. 



Vivian, Wm. Note on paragenetic fonnations of carbonate of lime 

 and oxide of iron, and of quartz and oxide of iron, at the Mwyndy 

 iron-mines, Glamorganshire. With Note on the Specimens by 

 J. H. Collins. Min. Mag. no. 1, pp. 18, 19 ; part of a chromo- 

 lith. plate. 



Wichmann, Dr. Arthur. Ueber doppelbrechende Granaten. 

 [Doubly-refracting Garnets.] Pogg, Ann, F. 6, Bd. vii. pp. 282- 

 . 290. 



Willett, E. W. The Sub-Wealden Exploration, ^th Ann, Rep, 



Wellington Coll. Nat. Sci. Soc. pp. 31-38. 

 A general account of the Netherfield boring and of its objects^ 



i2 



