350 RECORD OF SCIENCE FOR 1887 AND 1888. 



Klein, Cahl — Coutiuned. 



trachyte, from Bolsena and Monte di San Magno ; trachyte tutf, from Vallo Vi- 

 doua ; lencite tephrite, leiicite basauite, and augite andesito. with accessory 

 olivines. The rocks are described iu detail with a large number of complete an- 

 alyses. 



Koto, Bund.iiro. On some occurrences of Piedinoutite Schist in Japan. Quar. .To. 

 Geol. Soc, No. 171, August, 1888, vol. xuii, p. 474. 



Kroustchoff, K. de. Nouvelles synthases du quartz ct de la tridymite. Bull. Soc. 

 Frau^aise Mineralogie, January, 1887, vol. x, p. 31. 



Note sur une inclusion d'une encrite a enstatite dans le basalte de Wiugendorf 



pres de Laban, en Sil6sie. Bull. Soc. Frangaise Mineralogie, December, 1887, vol. 

 X, p. 329. 



Notice snr la granulite variolitique de Fonni, pres de Gkittorrai, Sardaigne. 



Bull. Soc. Frangaisc Mineralogie, April and May, 1888, vol. xi, p. 173. 

 Lackoix, A. Note sur un mode de reproduction du Corindon. Bull. Soc. Fraufaise 



Mineralogie, vol. x, March, 1887, p. l.')7. 

 Note sur la composition j)6trographique des roches de Blekka ct Dalaue (Nor- 



wege.) Bull. Soc. Frangaise Mineralogie, March, 1887, vol. X, p. 152. 

 and Baket, Ch. Sur la pyroxcnite a wernorite du Point-du-.Jour, pres Saint- 



Nazaire (Loire-lnt'erieure.) Bull. Soc. Francaise Mineralogie, July, 1887, vol. x, 

 p. 288. 



Launay, L. de. Note sur les Porphyrites de I'Allier. Bull. Soc. Geol. de France, 

 1888, 3rd Series, No. 2, vol. xvi, p. 84. 



Lawson, Andrew C. Geology of the Rainy Lake Region, with remarks on the clas- 

 sification of the crystalline Rocks, west of Lake Superior. Preliminary note. 

 Am. Jour. Sci., 1887, vol. xxxiii, p. 473. 



Note on some diabase dykes of the Rainy Lake Region. Am. Geol., April, 



1888, p. 199. 



Lejiberg, J. Zur Kenntnissder Bildung und Umbildung von Silicateu. Zeitschrift 

 deut. geol. Gesell., xxxix. Band, 3. Heft, p. ij.')9. 



Lewis, H. Carvill. On a Diamautiferous Peridotite, and the Genesis of the Dia- 

 mond. Geol. Mag., January, 1887, p. 22 



Calls attention to the fact that the South African diamonds occur in portions 

 of a peridotite iu contact with highly carbonaceous shales. 



The Matrix of the Diamond. Geol. Mag., March, 18a8, p. 129, 



Describes the porphyritic peridotite in which the South African diamonds 

 occur. The principal mineral constituents are bronzite, chrome diallagc, snuirag- 

 dite, biotite perowskite, pyrope, titanic and chromic iron. Rutile is mentioned 

 as occurring as a secondary constituent through the alteration of olivine into 

 serpentine. The structure is porphyritic and l)recciated ; suggests the varietal 

 name of KimherHte. 

 Loewinsox-Lessing, F. Die mikroskopische Beschatfeuheit des Sordawalits. Min. 

 nnd pet. Mittbeilungen, ix. Band, 1. Heft, ]). (51. 



Shows that the so-called Sordawalite of Nordenskjold is not a true mineral 

 species, as heretofore supposed, but a vitreous eruptive rock — diabase ritrophyrite, 

 according to the autlior. Four figures showing micro-structure. 



Zur Bildungsweis(i und Classification der klastischen Gesteine. Miu. u. pot. 



Mitth., B. IX, VI, p. 528. 



LouicTZ, H. Ueber das Vorkommeu von Kersantit und Glimmeriiorphyrit in derselben 

 Gaugspalte, bei Uuternoubrunn iui Thiiriuger Walde. Jahrb. der k. preus. 

 geol. Land- und Bergakadenuc zu Berlin, 1887, p. lOU. 



LUDWIG, E.,and G. Tscher.mak. Der Meteorit von Angra dos Reis. Min. und pet. 

 Mittbeilungen, viii. Band, V. Heft, p. 341. 



The stone is described as consisting of augite, 93.28 per cent.; olivine, 5.45 per 

 cent.; pyrrhotite, 1.27 per cent., and is anomalous iu showing, on analysis, 

 24.51 per cent, of CaO. The name Aiujrilc is proposed for this new variety of 

 meteoric stones. 



