METEORITE COLLECTION—HANDBOOK AND CATALOGUE. 23 
Upon the metallic portions of the aerosiderolites the Widman- 
statten figures can usually be brought out (Atacama 162, Rock- 
wood 184) and, as these are quite similar to those of the wholly metallic 
meteorites, they indicate the existence of corresponding conditions 
in the formation of the mass. 
Analyses of some of the aerosiderolites represented in the collec- 
tion show the following composition :— 
(1) (2) (3) (4) (5) 
Atacama, Krasnojarsk,  Rittersgriin, Carroll Co., Hainholz, 
Chile. Siberia. Saxony, Ky. Prussia. 
(160) (157) (164) (180) (165) 
Be as a «556 13500 20.43 26.79 29.52 3724 
Pew pacek. 62.60.27 44.02 { FefeNi. } 20.48 4.12 
No ye ee UC so.4t BS 22.20 
1 0 ee Se ehers) 6.86 ar68 aS ie fast ey 
eRe araia <0; 01 Mn O 0.70 0.72 
Onn: s. Vo § 3166 
Pee ta ce TSS 23.67 Sea Bla? 30.52 
Rivne mt Se Bey {Naz 0} 4.22 1.05 
0 pa ae Ores 9.48 0.28 
Ree eth © hax: 0.02 
Soe he a a 1 0:93 Fe S | ‘o.02$ Lue ent 
eo 6 he 17.235 2.86 
PAeOhe.. c.0:. 0.20 0.24 
99.58 IOI.07 96.13 100,00 98.72 
teat rx a ns. -OyLO 5.44 4.29 4.41 4.61 
From meteorites of this class every gradation can be traced to 
the aerolites, meteorites in which the stony or siliceous matter predo- 
minates. These usually contain scattered metallic grains, sporado- 
siderites of Daubrée (Kesen, 257, New Concord, 274, Homestead, 314), 
but some show no metallic constituents whatever, aszderites of Dau- 
brée (Alais, 221, Juvinas, 237). The aerolites are made up chiefly of 
the minerals chrysolite, bronzite, augite, enstatite or some other 
member of the pyroxene group, anorthite or other feldspar, chromite, 
nickel-iron and troilite. These are usually crystallized and occur in 
angular, splintery fragments, but are sometimes developed porphyriti- 
(1) Von Kobell and Rivero, Korrespondenz- Blatt Vereines Regensberg, 1851. Recalculated by 
M. E. Wadsworth on the supposition that the silicates constitute one-third of the mass. 
(2) J.J. Berzelius, Ann, Phys. u. Chemie 1834, Vol. 33, pp. 123—135. 
Recalculated by M. E. Wadsworth on the supposition that the silicates compose one-half of the 
mass. 
(3) C. Winkler, Nova Acta Leop. Acad. Halle, 1878, Vol. 40, pp. 333, 282. 
(4) J. B. Mackintosh, Am. J. Sc. 3rd ser , Vol. 33, p. 232. Mar. 1887. Recalculated by the author 
on the supposition that the silicates constitute three-fourths of the mass. 
(5) C. Rammelsberg, Mon. Berlin Akad., 1870, pp. 322—325. 
Other analyses may be found in the work of Wadsworth, previously cited. 
