_ JUNE, 1911. ANALYSES OF STONE METEORITES — FARRINGTON. 197 
Brezina is quantitative, as the present writer has shown.* The metallic 
content of the stone meteorites, however, finds little recognition in the 
Brezina system. 
It will be obvious that some modification of the Quantitative 
Classification of terrestrial rocks is necessary in order to fit it for use 
with meteorites. Among these one is due to the impossibility of using 
regional names for the nomenclature of orders, sections, etc., of mete- 
orites. For this reason in designation of the subdivisions the writer 
has used only descriptive adjectives. A group name is given only to 
the last group, the subrang. This name is that of a meteorite as 
nearly representative in composition as possible, preference being 
given, where there is a choice of names, to the better known meteorites. 
Another modification of classification necessary has been on account of 
the abundance of metal in meteorites. This required the formation 
of several subclasses in the classes in which among terrestrial rocks 
but a single subclass exists. Two subclasses are thus required in 
Class IV and four in Class V. As no nomenclature was proposed 
by the authors of the Quantitative Classification which would be 
applicable to more than one subclass, it has been necessary for the 
writer to provide names for the additional subclasses. This has been 
done by coining adjective terms indicating the relative quantities of 
silicates and metal. The adjectives for the five subdivisions are: 
persilicic, dosilicic, silico-metallic, dometallic, and permetallic. As 
will be noted by consulting the tables, most meteorites fall outside of 
the groups of terrestrial rocks. The following groups are similar in 
meteorites and terrestrial rocks: Kedabdekase of terrestrial rocks 
corresponds to Juvinose of meteorites; Wehrlose to Udenose; Argeinose 
to Stawropolose; Maricose to Bishopvillose; and Websterose to Bustose. 
Some minerals not found in terrestrial rocks occur in meteorites. To 
these the writer has given the following abbreviations: troilite, tr; 
oldhamite, of; nickel-iron, nf. As it is occasionally necessary to assume 
the presence of the molecule (Mg, Fe)O in meteorites, the name femite 
and abbreviation mo are proposed for it. The standard minerals as- 
sumed to be present in meteorites and their abbreviations are then as 
follows: 
GROUP I: SALIC MINERALS 
eM Re NR aso wae ake ace noe hs co ee Be 8 gs ©) 
SUE CA Dest A ania) ew £5 he ohocsh «eters dimys. 4 seelecate eld g Z 
Oremeigce. Ko ©. Als Os. 6 SiOs.ticceca cece eee as or 
retain GNA ls Ca... 6 Ot Oo. win gis es eles» eats o> ab F 
Meroeegie a iC) ~ Aly Og ..2 Si Oo... ase es emtine s oe s an 
* Bield Col. Mus. Pub. 1907, Geol. Ser., Vol. 3, p. 108. 
