May, 1902. METEORITE STUDIES, I—FARRINGTON. 299 
so that the above can practically be regarded as bronzite. It may 
seriously be questioned, however, whether digestion in hydrochloric 
acid can be relied upon to wholly separate the chrysolite and bronzite, 
for with longer digestion some of the bronzite is apt to go into solu- 
tion, or, with shorter treatment, some of the chrysolite may not be 
decomposed. Further investigation of this subject should beymade. 
Taking all the probable ingredient minerals of the rock into con- 
sideration, the following is perhaps the best estimate that can at 
present be made as to its probable composition: 
~ Per. Cent 
Bronzite and Monoclinic Pyroxenes ; ~  AZOS 
Chrysolite . : : A ; 4 " 3 3 oe 24374 
Limonite . : : ; ; : Jes 1050 
Chromite. : : ; ; - ; é ; a eto pteke: 
Troilite 4 f ; : ; : : ; : aay 24 
Sehnreipersite” : : 4 ; ; : aC. 23 
De teeee eer iteene esse Gas Uh, eRe Mate, |. 3,31 
Oxides of Cobalt and Nickel . ; ; ie. OLTO 
100.00 
Here the limonite is probably of secondary or terrestrial origin 
and should perhaps be divided up about equally between the nickel- 
iron and troilite in estimating the pre-terrestrial composition of the 
rock. The composition as shown above of about one-half bronzite 
accords well with what one can observe after treating a section with 
hydrochloric acid so as to dissolve out the chrysolite, for an exten- 
sive framework made up of bronzite then remains. The high per- 
centage of chromite indicated by the analysis is also in accordance 
with observations made with the microscope. 
The resemblance of the meteorite to terrestrial peridotites is, 
as noted by ‘Weinschenk, very marked, and the constant association 
both in terrestrial and extra-terrestrial regions of the elements and 
minerals which compose rocks of this class indicates laws of asso- 
ciation which are not yet comprehended. 
SUMMARY. 
1. The Long Island meteorite is a single isolated fall and fell as 
a single stone. 
2. It is the largest single stone meteorite known. 
3. Itis traversed by planes resembling joint planes which are 
pre-terrestrial in their origin. 
