NovemsBeER 8, 1918] 
through several editions, the American vol- 
ume first appearing in 1556, and being revised 
in 1657, 1662 and 1667 (?). The copy has a 
title-page dated 1662, but the maps all bear 
the date 1657. It may be noted that the vol- 
ume contains an early mention, in the chapter 
on Paraguay, of the great Guayra falls on the 
Parana river. Copies have also been secured 
of the first English edition (1708) of Francois 
Leguat’s “New Voyage to the East Indies,” 
containing a detailed account of his experi- 
ences in the islands of Rodriguez and Mauri- 
tius, with descriptions and quaint cuts of their 
remarkable fauna and flora; and of Le Huen’s 
adaptation (with additions describing his own 
experiences) of Breydenbach’s famous “ Peri- 
grinationes in Terram Sanctam.” This copy 
is of the third edition, 1522. Lastly, a com- 
plete set has been acquired of the great French 
“Description de l’Egypte,” based upon the 
work of the French scientific men sent to 
Egypt by Bonaparte at the time of his inter- 
vention in that country. 
QUICKSILVER DEPOSITS IN THE PHOENIX 
MOUNTAINS, ARIZ. 
THE present exceptional demand for quick- 
silver in the manufacture of fulminate gives 
the domestic deposits of this war metal par- 
ticular interest. Deposits recently discovered 
in the southern part of the Phenix Mountains, 
10 miles northeast of Phenix, Ariz., are de- 
scribed in a short paper prepared by F. C. 
Schrader, just published by the United States 
Geological Survey. The deposits are easy of 
access, and being near the rich agricultural 
region of Salt river valley are otherwise favor- 
ably situated for mining. They are being ex- 
ploited on six or more properties or groups of 
claims, which lie in a belt, about 3 miles wide, 
that extends northeastward diagonally across 
the range. 
The rocks in the region are metamorphosed 
sediments of pre-Cambrian age, chiefly schist, 
slate argillite, limestone and quartzite. They 
crop out in narrow parallel zones and dip 
steeply to the southeast. They are horizon- 
tally sheeted and are crosscut by faults, frac- 
SCIENCE 
463 
tures and cleavage. The deposits are in the 
zones of schist, notably quartz schist and 
kyanite schist. They are lodelike deposits, 
some more than a mile long and in places 80 
feet wide, which occur along zones of shear- 
ing or fracture that are parallel with the 
lamination of the schists. 
The ore minerals are cinnabar and cinna- 
barite. They are found mostly along the 
planes of schistosity, forming ore bodies sev- 
eral inches wide and 3 or 4 feet long, but they 
also occur sporadically in quartz stringers and 
veinlets. A little native quicksilver has also 
been reported. Associated with the deposits 
are copper minerals, especially malachite, 
chaleicite, and chalcopyrite. The gangue 
minerals, the chief constituents of the string- 
ers and veinlets, are quartz, calcite hematite, 
limonite, specularite, kyanite and tourmaline. 
The deposits were probably formed by heated 
solutions or vapors which, ascending through 
the shear zones, penetrated the interstices of 
the rocks and deposited their mineral burden 
as veinlets and films by impregnation and re- 
placement. They are provisionally referred 
to the Tertiary period, during which volean- 
ism was general in the southwest. Tertiary 
voleanic rocks occur at several places in the 
surrounding region. 
Although the deposits are but slightly de- 
veloped, the deepest shaft being but 60 feet in 
depth, three of the properties yield workable 
ore that carries 3 per cent. or more of quick- 
silver. The persistence of the lodes'and down- 
ward improvement of the ore in the shafts 
indicate that the ore extends to considerable 
depths, especially in the oxidized zone. 
As the deposits are easily accessible, ore 
averaging as low as 1 per cent. in quicksilver 
can no doubt be profitably worked with the 
metal at its present market price. On one of 
the properties a retort furnace has been in- 
stalled and a small amount of commercial 
quicksilver produced. 
The paper describing the deposits, which is 
published as Bulletin 690-D, under the title 
“ Quicksilver deposits of the Phenix Moun- 
tains,” may be obtained by applying to the 
