MINERALS. 811 
JAROSITE. 
A. From Black Iron mine, Eagle County, Colorado. 
B. From Pigeon mine, Rico district, Colorado. 
Analyses by W. F. Hillebrand. 
’ NATROJAROSITE. 
From Soda Springs Valley, on road from Sodaville to Vulcan copper mine, Nevada. 
Described by Hillebrand and Penfield in Am. Jour. Sci., 4th ser., vol. 14, p. 211. 
Analysis by W. F. Hillebrand. Sp. gr., 3.18 at 30.5° 
PLUMBOJAROSITE. 
From Cooks Peak, New Mexico. Described as a new species by Hillebrand and 
Penfield in Am. Jour. Sci., 4th ser., vol. 14, p. 211. Analysis by W. F. Hillebrand. 
Sp. gr., 3.668 at 30.5°. 
cence .10 | H20 at 105°...-. 
vineesbr ts 19.84 | HzO above 105°. 
EMMONSITE. 
A hydrous ferric tellurite from near Tombstone, Arizona. Analyzed partially by 
W. F. Hillebrand, and described by him as a new species in Proc. Colorado Sci. Soc., 
vol. 2, pt. 1, p.21. The data relative to the composition of emmonsite are as follows: 
‘le ts Sratabea espe soar chorcccnd cea Seidatui tS Sarde hs je 2S, Seperate x metre terete 59.77 | 59.15 | 59.05 59.14 
Pisce oe 
