272 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. 
[no. 
H 2 above 
CO, 
105° 
4.11 
1. 10 
P A 
trace 
S 
06 
0,0. 
.07 
Xi() 
10 
MnO 
24 
100. 38 
BRITISH COLUMBIA. 
Peridotite, junction of Eagle Creek and Tulameen River, Yale 
district. Dunose. Described by J. F. Kemp in Bull. 11)3. About two- 
thirds olivine and one-third serpentine, with some magnetite, calcite, 
and magnesite as accessories. Analysis by W. F. Hillebrand, record 
No. 1930. 
Si0 2 - - - 38. 40 
A1 2 3 . 29 
Fe A 3. 42 
FeO 6. 69 
MgO - 45.23 
CaO 35 
Na,0. | .08 
K 2 1 
FLO at 105° 24 
TiO„ Zr0 2 , BaO, SrO, and Li 2 were absent. 
HAWAIIAN ISLANDS. 
Rocks collected by Whitman Cross, who supplies the petrographic 
data. Analyses, hitherto unpublished, by W. F. Hillebrand, record 
Nos. 2038, 2112. 
A. Trachyte, from Puu Anahulu, North Kona, Hawaii. Ump- 
tekose. Consists chief!}' of alkali-feldspar, with small amounts of 
diopside and obscure sodic amphiboles or pyroxenes. Analysis 
incomplete. 
B. Trachyte, from Puuwaaraa, North Kona, Hawaii. Umptelcose 
near nordmarlcose. Black glass, containing alkali-feldspar microliter 
and ferritic particles. 
C. Basalt, crater of Haleakala, Maui. Essexose. Contains plagi- 
oclase, orthoclase, nepheline, augite, much less olivine, magnetite, and 
apatite. 
D. Plagioclase-basalt, Makaweli Canyon, Kauai. Auvergnose. 
Consists essentially of augite, olivine, plagioclase, and magnetite, with 
a little glass}^ base. 
E. Melilite-nephelite-basalt, Kilauea Landing, North coast of 
Kauai. Uvaldose. Consists essentially of augite, olivine, melilite, 
nephelite, magnetite, and apatite, with a little analcite. In vesicles, 
also, an undetermined fibrous zeolite. 
F. Portion of E soluble in one-fortieth nitric acid. 
