FS det 
ey gray Seton raha pS aca acpi wags cd oii al ie ial te Se Reais ROC AL, ace gee al ae ea 
ve ” oe 
On ee ae 
Seventh Supplement to Dana’s Mineralogy. 129 
J. Hatt and J. D. W : Report on the Geological Survey of the san of 
Yowa, pean the rarer of iannlipanens made dur ring portions of the 
1855, 56, 57. 725 ie a 8vo, with numerous plates.—Prof. Whitney has oes 
lished analyses of various limestones, dolomites, iron ores, coals, and treated also 
beiefly of the lead gids of the Upper Mississippi. 
W. E. Logan: Geological Survey of Se meng Report of Progress, for the year 
1857, 240 nor vo.—Contains oe - n the economical minerals of Canada, 
and a paper on Dolomites by T. S 
O. M. Lizper: pores IIT. on the Berio Survey of South Carolina, 224 PP. 
8vo with maps. 1858,—Contai ns chapters on n the pay a other minerals and rocks 
ofa Saag of South Carolina, 
wre Ger Das Koénigliche mineralogische Museum in Dresden. 
ions —A nae amici of the minerals of the Dresden Museum and a plan of 
the Priding aad —ooneoryan 
C. U. Suz se Frcs sth e Mount sg Copper Mine. 8 pp. 8vo. New 
Haven, 1859,— se piper ¢ ore m og opyrite, It oceurs in gneissoid mica schist. 
The other minera te of Mt. Pisg: vivianite in fine crystals, automolite, apatite, 
hyalite, staurotide, tremolite, = aaa etc. An impure chlorite from the region 
: named lepidochlore. There is no analysis given, and no other good foundation 
me. 
In the same pamphlet, Prof. Shepard proposes names for aaa pi substances naa 
which hes promises foture descriptions) from Ducktown, a co ine in the 
vicinity, in eastern Tennessee. ese names are Copperas ine bei a“ hydrated fr 
rous cuprous and fe ferric sulphate ;” Leucanterite for an | eatlor rescence on the co 
; n 
ucktown. The mineral appears 
mixture H.=5°5, G.=4'55—4°66 (Mr. R. A an Color blackish oreee? 
with a shade of bronze. Said to contain 30°76 es 26°04 copper, with 4 
Bw. termined, but set down as “ adeae by differen 
rof. G. J. Brush has handed me the following ie of the Ducktownite and 
pie ae re 
“ Having recently visited the Ducktown mines, I have obtained —- of the 
80-called new species ducktownite, and after saryew myself of their authenticity 
tee 
quantity of yellow copper pyrites. 
88 possible gave the Bs ge characters, . Before the orev in ogra yie ielded 
py i pen for sulphur and left a reddish ue. 
Fused on charcoal the assay became etic. A specimen carefally roasted on 
chareo ur ceased given off, was dissolved in salt of rus 5 
it gave a reaction for iron only, no reaction for seppet wae was obtaiaed even on fusing 
the bead with chlorid of pent , thus ithe the mineral to be entirely free from 
pper base rage sufficient to ee cor aa tion this tog ether with the reac- 
Pomtaae ae on charcoal indicate examination 
sul examined in the matrass, 
ES cian, Mieco tes phar whe open tube and on charcoal, and 
the presence of a large amount of copper. In hardness it was very infe- 
ronze mineral, but its mixture wit. Sidon r prevented an accurate 
n assay made of a gece of this mixture, containing a 
‘amount (not over one or two per cent at most) of malachite and perhaps also a 
3 SECOND 
SERIES, Vor. XXVIII, No, 82.—JULY, 1859. 
17 
