350 RECORD OF SCIENCE FOR 1887 AND 1888. 



Klein, Carl — Coiitiuued. 



trachyte, from Bolsena and Monte di San Magno ; trachyte tuff, from Valle Vi- 

 doua; leucite tephrite, leucite basanite, and augite andesite with accessory 

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

 alyses. 



Koto, Bundjiko. On some occurrences of Piedmoutite Schist in Japan. Quar. .Jo. 

 Geol. Soc, No. 171, August, 188^, vol. xliii, p. 474. 



Kroustchoff, K. de. Nonvelles synthases dn quartz et de la tridymite. Bull. Soc- 

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



Note sur une inclusion d'une encrite a eustatite dans le basalte de Wingeudorf 



pr^s de Laban, en Sil6sie. Bull. Soc. Fran^'aise Mineralogie, December, 1887, vol. 

 X, p. 329. 



Notice sur la grannlite variolitique de Fonni, pre-s de Ghittorrai, Sardaigne. 



Bull. Soc. Fran^aise Miu6ralogie, April and May, 1888, vol. xi, p. 173. 

 Lacroix, a. Note snr un mode de reproduction du Corindon. Bull. Soc. Franf aise 



Mineralogie, vol. x, March, 1887, p. 157. 

 Nete sur la composition p4trographi(ine des voches de Blekka et Dalane (Nor- 



wege.) Bull. Soc. Fran^aise MiufSralogie, March, 1887, vol. x, p. 1.52. 



and Barf.t, Ch. Sur la pyro.Keuite a weruerite du Point-du-Jour, pros Saiut- 



Nazaire (Loire-Inferieure.) Bull. Soc. Franyaise Mineralogie, July, 1887, vol. x, 

 p. 288. 



Launay, L. DK. Note sur les Porphyrites de rAllier. Bull. Soc. Gcol. du 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. 



Lkmberg, .J. Zur Kenutnissder Bildung und Unibildung von Silicaten. Zeitschrift 

 dent. geol. Gesell., xxxix. Band, 3. Heft, p. 5.59. 



Lewis, H. Carvill. On a Diamiintiferous 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 in contact with highly carbonaceous shales. 



The Matrix of the Diamond. Geol. Mag., March, 1888, p. 129. 



Describes the porphyritic peridotite in which the South African diamonds 

 occur. The principal mineral constituents are bronzite, chrome diallage, smarag- 

 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 brecciated; suggests the varietal 

 name of Ehnberlitc. 

 Loewinson-Lessing, F. Die mikroskopische Bcschaffeuheit des Sordawalits. Miu. 

 nud pet. Mittbeilungen, ix. Band, 1. Heft, p. ()1. 



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

 species, as heretofore supposed, but a vitreous eruptive rock— diabase vif7'ophtjrite, 

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



Zur Bildungsweise nud Classification der klastischen Gesteine. Min. u. pet. 



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



LORKTZ. H. Ueber das Vorkommen von Kcrsantit und Glimmerporphyrit in derselben 

 Gaugspalte, bei Unterneubruun im Thiiriuger VValde. Jahrb. der k. preus. 

 geol. Laud- und Bcrgakadeniie zu Berlin, 1887, p. 100. 



LuDWiG, E., and G. T.sciiermak. Der Meteorit von Angra dos Reis. Miu. und i)et. 

 Mittheilungen, viii. Band, v. Heft, p. 341. 



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

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

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

 meteoric stones. 



