262 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
E. Diallage from the gabbro of Ashland County, Wisconsin. Analysis by W. F. 
Hillebrand. 
F. Pyroxene from orthoclase gabbro, 1 mile northeast of Haystack Mountain, Liv- 
ingston quadrangle, Montana. Described by W. H. Emmons, Jour. Geology, vol. 16, 
p..193. Analysis by G. Steiger. 
G. Augite from nepheline basalt, Black Mountain, Uvalde quadrangle, Texas. 
Violet colored. Analysis by W. F. Hillebrand. 
H. Augite from dolerite dike, near Valmont, Colorado. See Cross, Mon. XXVII. 
Analysis by L. G. Eakins. 
I. Augite from tinguaite, Two Buttes, Colorado. Sp. gr., 3.43 at 28°. Analysis by 
W. F. Hillebrand. 
J. Pyroxene from syenitic lamprophyre, Two Buttes, Colorado. Sp. gr.,3.45 at 25°. 
Analysis by W. F. Hillebrand. 
K. Augite from granite, north end of Blue Mountains, Silver Cliff, Colorado. Sp. 
gr., 3.225 at 18°. Analysis by L. G. Eakins. 
L. Augite from the Golden King dike, Silver Cliff, Colorado. Sp. gr., 3.281 at 18°. 
Analysis by L. G. Eakins. 
M. Pyroxene from norite, dike east of Sugar Loaf, Boulder County, Colorado. 
Analysis by L. G. Eakins. 
100.27 | 99.77} 100.16 
N. Pyroxene from Italian Mountain, Gunnison County, Colorado. Associated with 
idocrase, scapolite, garnet, epidote, etc. Analysis by L. G. Eakins. Sp. gr., 3.312 
at 16.7°, 
