115 
ver Cummings ington, in 
Birds = Mature for i eats 1901, 
erystals are teat in the form 
of long, slender prisms; ae often 
have the seme rity a ae 
ently colored i differ 
Baiariecs at the o 
been known in 
wee 
Of red .t 
in the 9 ig lilae Se ulmniiee are pote 
Bit of gem but are now to b 
found in seatty every mineral cabinet 
in the world. 
At Mesa Grande, east of San Diego, 
e most Accept deposits of 
f£ener- 
of feldspathic minerals 
(3) d, and i 0 
Sranite foundation, contai asses 
lepidolite, angula 
tal quartz, and 
ne, and other min 
his matrix were the beau- 
‘tut ‘wari- colored erystals f tourma- 
saad of the finest #6 ale ever 
.F ORCUTE., 
ledge, were 
ound. 
The West American Scientist. 
116 
HOUSE HOLD PESTS. 
‘The Silver Fish’ belongs to the low- 
in or near t h to the extrem- 
ity of its body, and often one of th 
mos eae eso ae enemies of books, 
ard in m ums, 
startet Solus. he more rarely 
stored food substances. The tire 
surface of the body is pvety with 
very minute scales like tho 
a 
moth. igen he se eae 2 eoriincat 
antennae, an tip of the body 
nd he 
are 3 oo rie: sien appendages, 
one pointing directly backward, the 
ther 2 e ing out a consider- 
ble angle; 4 shorter appendages are 
near; 6 1 spring f the thorax, 
and, while - very long, they are pow- 
erful eee ia the insect to run wi 
great oidit 
He cen goes ee paper is very attrac- 
tive to this insect, while it often causes 
a seale off by i 
wall paper to by its feeding 
the starch paste. Pyrethrum fur- 
nishes a best of control, 
wherever it can be applied. C. L. Mar- 
latt des afta and figures it in bulletin 
Yo. 4, new series, division of entomol- 
ogy, U. S. department of agricuiture, 
from which the above n are ma 
on M0 neni is 
s 
Géaity Neeaiecob 
METALS AND ORES. 
ANTIMONY—An ore carrying about 
38 to 40 per cent of mp cme and from 
~ to $30 per ton gold, — rites 
San Diego, and a nite develipns 
A M—A seats 
in minute quantities in lepidolite. It 
would nreve useful if an available sup- 
ply existed. 
LITHIUM.—Amblygonite, lepidolite, 
spodumene, and triphylite are the prin- 
cipal ores of this rare metal, th2 ligat- 
est known 
— 
se ICKSILVER, —Cinnabar 
principa 
natin sine of the rare metals, 
more ‘ees ious than gold, oceurs as 
by-product of the lithia mines. 
is the 
