424 Scientific Intelligence. 
native tellurium and quartz; also at the Smuggler Ming where 
it is often mixed with native gold, tellurium and tellur 
nolite. Occurs in exceedingly fine sation, poe in 
at the Keystone Mine, Magrolia 
District, Colorado ; it occurs in ae upper decomposed portion of 
the mine, with quartz, limonite and aendiees having been 
produced by the oxidation of coloradoi 
Kerrotellurite. A crystalline coating on quartz, associated with 
native tellurium; under the microscope it appears in very delicate 
tufts, sometimes radiatin ng, or in erate in minute prismatic 
erystals of a color between straw and lemon-yellow inclining to 
tity in hand did not allow of a reliable ip Baeky sis. Found at the 
Keystone Mine, Colorado. 
Dr. Ge also mentions the occurrence of 7ellurite (tellurium 
dioxide, TeO,) at the Keystone, Smuggler, and especially at the 
John Ja ay Mine, Ustors do. It is found in minute white, yellowish- 
white and yellow crystals, mostly prismatic, isolated or aggregated 
into bundles. eavage eminent in one direction, luster on this 
face adamantine, elsewhere vitreous inclining to resinous. The 
same compound was observed ith native tellurtum at 
nolia District, outed it contains, however, more aluminum and 
less vanadium. An analysis of the Siberian "volborthite i - oven 
and its relation shown to the species psittacinite. . D. 
6. ineralogische Miitheilun gen von G. vom Rat ee pores 
land, and on compou und rutile apron a recap the expla- 
nation of the obscure be gabercre 1a ) thread- 
like forms of gold, oleae Sanh contribution, and is 
on idated by a considerable n of figur 
