placed u 
4 4 
21 The West American Scientist. 22 
Colorado desert and Baja California. 
HALITE—The salt fields of the Colo- 
r 
add considerably to our com- 
merce. 
HEMATITE—This iron ore occurs 
greater sig ral on the 
ert and i Baja California, where the 
writer bral ned some specimens 
of hematite th quartz in the anto 
valley. 
E, or Muller’ s glass—A var- 
ribed 
occurring 
fine ‘sg of this stone occurs near 
San Die 
INDICOLITE—Blue Care Ages are 
San 
tall as occuring Diego 
coun 
ITACOLUMNITE — Flexible sand- 
ston been reported from the 
Pemba st but has not been seen 
by the w 
PeraR Bela California 
ET—A fine black jet, evidently in 
some quantity, is reported from the vi- 
cinity of Santa Fe, New Mexico. 
ALINIT m occurs in consid- 
erable abundance in the patty the 
of 
ently tested by the owners of the num- 
erous claims, 
ehadhon and so far seems 
we favor. i get lysis by H. Boedt- 
r & e the foll owing result: 
Silica, 62.30 4 ae cent; alumina, 20.50 
S 
® 
fe] 
2) 
aa 
ot 
a 
a 3 
4 
N 
«J 
e in the wor 
new American industry inaugurated - 
ttracted considerable arned is 
eet 
the close of the century. 
LEUCITE: 
The history of leucite is very interest- 
ing Some 30 years ago Humboldt 
made the general statement that leucite 
occurred nowhere outside, of - Europe 
Curiously enough, until within a few 
years this statement held good. In 1874, 
however, Vogelsang found it in an Asi- 
atic baSalt, and in 1876 Zirkel announced 
its discovery in Wyoming 
‘Another extra-European locality we 
leucite is ow announced by Vo 
Chrustschoff, who finds it in a lava a ; 
the vicinity of the extinct voleano Cerro 
de las Virgenes in Baja ‘‘alifornia. 
rock consists of an ash-gray ground mass 
sprinkled with rounded spots of brown- 
ish-black obsidian or glass, 
light specks of leucite 
ss are shown by 
ounded octagonal outlin 
‘The ieucite is eile clear and 
a lens to have a 
x 
fresh, and shows in polarized light the — 
well known twining structure, even bet- 
ter marked than in leucite of the Vesu- 
vian lavas or of the Laacher-Nee While 
generally in rounded masses, the smaller _ 
individuals are apo freee, Spee 
in outline The oscope he 
‘inclustongy 
bubbles,’ EE Cy 
ewis, repri i. ii 
e 
ro Nay ~~, 4 fink thick, 13? 
miles north of San Die 
y onte years ago, but seems 
to have 
mains undevel 
IMEST TONE_-About 11.5 eubie feet 
weigh a ton, or 174 pounds to the cubic 
foot. calcite. 
LIMONITE—Elsinore, Cal. 
MAGNET 
California. 
been — lost sight of and re- : 
