102 PEEIDOTITE, 



The pyrrhotite occurred in small grains, not only in inclusions in the globules and 

 fragments, but also in the groundmass. 



The iron is mostly in irregular pronged particles in the groundmass. * 



Huiigcn, Germam/. 



The Hungen meteorite has been described both by Buchner and Tschermak. Tscher- 

 mak stated that the section showed quite large particles of iron, a few small grains of 

 magnetite, with fragments of minerals and spherules in the groundmass. Some small 

 untransparent grains without metallic lustre were thought to be chromite or jjicotite. 



The other minerals were olivine and bronzite, besides brown angular grains that 

 were supposed to be augite. This, like nearly all the meteoric peridotites, is chondritic. 

 Needles and grains of a water-clear mineral, and fine grains of chromite were seen in 

 the olivine. The enstatite contained brown needles and grains, as well as the chromic 

 iron dust.f 



Grosnaj'a, Caucasus. 



The color of the interior of the Grosnaja meteorite, according to Tschermak, is a 

 blackish-gray, sprinkled with clear to whitish-colored points. In the section the 

 groundmass is black and opaque, while many of the inclusions were either opaque or 

 transparent only in spots. Other mclusions were transparent, and showed mostly a 

 spheroidal structure, although a few pieces were angular-. 



Tschermak distinguished five different minerals : a clear-green olivine, bronzite, 

 augite, pyrrhotite, and a carbonaceous mineral. Iron in very small amounts was also 

 found. 



This meteorite showed chondritic structure, as seems to be usual with the olivine- 

 enstatite ones. J 



Alfianello, Brescia, Italy. 



This meteorite has beeir microscopically studied by Baron von Foullon. It has a 

 chondritic structure and is composed of nickeliferous iron, olivine, bronzite, an augitic 

 mineral, pyrrhotite, and maskelynite. The fresh fracture shows a pale-grayish white 

 finely crystalline surface sprinkled with pyrrhotite. The olivine is of a light color and 

 generally in grains. The bronzite is somewhat of a light-yellowish to brownish-yellow 

 color, and shows cleavage lines. The maskelynite was found as an intergrowth with tlie 

 bronzite, occurring as a colorless, water-clear substance. 



The chondri are irregular and sliow about the usual structural varieties. § 



* Deuks. TVieii. Akad., 1S79, xxxix. (2), 1S7-203, 5 plates ; Sitz. Wieii. Akad., 1878, Ixsviii. (1), 

 440-443, 5S0-582 ; Verh. Nat. Vci-eiii, Briiuu, 1879, xviii. 40, 41. 

 t Miu. Mitth., 1877, pp. 313-31G. 

 + Miu. Mittb., 1878 (2), i. 153-104. 

 § Sitz. Wieu. Akad., 1883, Ixxxviii. (1), 433-443. 



