496 Scientific Intelligence. 
with citric acid and KNO,: argentite, chalcocite, pyrite, marca- 
site, niccolite, smaltite, chalcopyrite ullmannite, arsenopyrite, te- 
trahedrite, uraninite, and a the species above enumerated as 
decomposed wi e “Th owing are decomposed by 
boiling with citric acid and NH,FI: olivine, wernerite, ortho- 
talc, spodumene, almandine garnet, epidote, and also the above- 
enumerated species which yield silica, 
Professor Bolton inate that solid citric (or tartaric) acid is 
far more convenient than hydrochloric for the traveling mineral- 
ogist; and also that potassium nitrite, KNO,, should be added to 
the usual list of blowpipe reagents ; for it a with citric acid, 
nitric acid, and it affords a ‘convenient means of carrying this 
reagent, We refer to the memoir for special detaila Hes reference 
to ay several mineral species studied by Professor Bo 
Note on Uranium minerals in North Cuesiinay 
i State Geologist. (Communicated.)—Besides the samarskite 
of the Wiseman Mica Mine in Mitchell County, with the associated 
hatchettolite of Dr. Smith, the minute crystals of microlite found 
in iia mines, and some stains and incrustations of uranium 
lat R 
the latter, and of the fragments of rock adjacent, Zorbernite and 
“ooh nite. These minerals occur only in one part of the mica- 
of 
irregular nodules and rounded masses, some with a. key tien of 
uraninite of one half to three-fourth inch, enveloped a heavy 
ite, 
from an eighth to a fourth of an inch thie k, which is uranochre, 
or uraconite. One — the largest, weighs "just a ead: an 
all I obtained between three and four pounds. The quantity of 
pitchblende eksiadasgr 1 naltered is very small and by far 
greater part of the mass “of the nodules, probably n aan is 
— and the smaller ones are nearly or entirely changed to 
uracon 
I oe recently obtained specimens, one pound in weight, of 
— from a new locality, viz: Grassy Creek Mine, in Mitchell 
unty. rab eiaa§ this mineral had been found chiefly, I believe 
onl vl at the Wiseman Mine. 
notable fact in connection with the occurrence of these ura- 
