Ss 
436 APPENDIX. 
Orver B, Sp. gr. mostly between 3°25 and 3°9. 
Group a. Variolitic ; after the manner of the mineral alle Variolite. 
roup 6. Somm mitic ; consisting of finely mixed crystalline minerals ; 
something after the nature of the ejected masses of Mt. Somma, Vesuvius. 
oupc¢. Tufaceous ; mixed ; spherules numerous, } * Porphyritic” 
ete of Shepard. 
Group d. Psammitic; arenaceous, “y ks sands tone, granular; color 
yellowish or brownish white; particles chiefly olivinoid; metallic parti- 
cles freely and visibly interspersed, occasionally with the aadanon of mag- 
netite and graphite, or veined and stained with rust; Bachmut may 
taken as the type. Polished surfaces show more S less of sphertie 
d,; ditto, very fine-grained texture. 
d, ; ditto, grayish; texture more compact or tough; 
New Concord and Lixna may be taken as types. 
Group e. Chondritic ; structure coarse-grained, grayish. 
ar : colt or pisiform, 
taining snvall angular if bag oe fragments. 
up f. Blanakitic after the manner of the nsko meteorite; 
ae eayiab blue, occasionally running into ¢ or d, Bae ly contains 
more Labradorite or augite than - ord. Texture rather uniform. : 
xroup h. Hralebenetic ; texture fine-grained, tough, and gritty; 
highly peridotic and ieee Uaroee ai a slight bronze-like luster; this 
represents quite a peculiar group, ‘of which the Erxleben meteorite may — 
type. 
et 
taken as the 
Crass IT. SIDEROLITES. 
Orper C. Sp. gr. nee meteoric iron, oeeneene or mixed with, 
matter and silic 
Group a. Pallas; ae coarsely ey 
itto, finely it acrd talline. 
Group 6. Partially or irregularly m xed aes 
Group c. Contai iid aérolithic Fucmenk imbedded in iron showing 
Widdmannstattian 
_ Ctass II. METEORIC IRONS, or AEROSIDERITES:? 
Orver D. Sp. gr. between 7-0 and 8-0. 
Group a. Agrammic ; ; without line-markings, not lettered when 
etched with acid. 
a a } Bacreous, ere lustered. 
as 4,5; spotted, or 
b. = wrogrammic ; Siinaisly arked. ha aoameaee 
Suey < mmic ; distinct] ae lines le’ * 
FP a Se mi, Bhar ic; distinctly mar ines para 
Group d, Spora-grammic ; scattered lines, finely marked. 
; ditto, coarsely marked 
Group e. Nephetie t¢ > convoluted, or clouded markings. 
| Group f. Undetermined; markings doubtful vot altered by artificial heat. 
- Rega ening nt portions of pyrites, magnetite, graphite, and 
‘Piensa 
Ps this ve 1 hI. 5 from foot, for 10”” rend 10". 
