Ok: 
freight on ‘it from that point to: N.Y. It 
is said that.the only other known large 
deposits of lepidolite are in Austria and 
Germany, but the quality of these latter 
is considered less valuable than these in 
f San Diego county. An analysis of some 
_ of the lepidolite from these Pala depos- 
|’ its showed that it contained about ten 
Z per cent. of lithia, and 60 to 70 per cent. 
_ potash, the lithia alone being worth $700 
per Speaking of these mines the 
' San Diego Union, ina late issue, says: 
.  “Superintent Frank Belden, who has re- 
'__ turned from a trip to Palomar mountain, 
| __ reports that the lithia mines in that sec- 
_ tion are being worked day and night. A 
force of 25 men is employed in taking 
out the lithia rock deposits. Actual de- 
_ velopment of the properties has not yet 
_ fully commenced, the work now being 
_carried on being to ascertain the extent 
of the aia and the cost of marketing 
the sa A considerable quantity of 
e the hock i is being shipped t 
f 
or lithia water.”—Los Angeles Times, July 
_LEUCITE: 
_ The history of leucite is very interest- 
> rs ago Humboldt 
‘ty was name 
3 other extra-European locality for 
~ Jeucite is now announced by Von 
Chrustschoff, who finds it in a lava 
the vicinity of the extinct volcano Cerro 
The West Americih Scientist. 
de las Virgenes i in Baja California. The 
rock consists of an ash-gray ground mass 
sprinkled with rounded spots of brown- 
ish-black obsidian or glass, and with 
light specks of leucite hese light 
specks are shown by a lens to havea 
rounded octagonal outline. 
‘The leucite is remarkably clear -and 
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-See. While 
generally in rounded masses, the smaller 
individuals are often clearly octagonal 
microscope shows the 
eucite ntain.many inclusions, 
among which are augite, apatite, olivine, 
plagioclase, magnetite. nepheline, and 
glass inclusions and bubbles.’—H. C. 
Lewis, reprint in W. Am. Sci. ii. 33. 
LIGNITE—A vein 4 feet thick, 
oe Diego, was repo is 
IT 12 
to _— of 
Dr. Le Conte years ago, but seems 
oa have been since lost sight of sak: re- 
mains undevelo, ni 
LIMESTO. 
g 
N bout 11.5 cubic fos 
weigh a ton, or Se pounds to the cubic 
foot. See calcite. 
LIMONITE—Elsinore, Cal. 
Tomas veiga' and at San Ysidro, Baja 
Californ 
SP ACH ad « carbonate of 
ee r, com about 71 
t copper since es 8] 
ieeiia acid and 8.2 per cent water, forms 
e most beautiful of copper ores, at 
times ing a semi-precious stone. 
h est specimens are bably 
found in the Ural mountains, but - 
nificent masses ha mined in 
rizona, and it usually occurs in co 
per mines where , chrysosolla 
MICA—The mica of commerce is a 
form of muscovite, but no mine in Sap ~ 
