L 
MINERALS. 247 
GUITERMANITE. 
New species, discovered by W. F. Hillebrand and described by him in Bulletin 20. 
From the Zufii mine, Anvil Mountain, near Silverton, San Juan County, Colorado. 
Forms the matrix of zunyite. Corrected specific gravity, 5.94 at 17.5°. Analyses 
by Hillebrand. 
Admixed zunyite.......02..00..00 cececeeceeeeeeeeeeeeeeeeeeees See Maaner ete a emetet! 1.77 
agi acre ra eS A UTNE 7 oer NG Nt cE Cae a Tie OnE 13.40 
III. TELLURIDES. 
HESSITE. 
From San Sebastian, Jalisco, Mexico. Sp. gr., 8.24 at 26°. Analysis by W. F. 
Hillebrand. 
Ne ONS ae peter ieee eames megens ddd Sele tanta SA LGd MARIS SOLES. 61.16 
VG. 5, 5)32 a Sesih eaoprayneisie he Sec wnine Sse cae SSE SER ee eee eae awit eee tees 36.11 
Bb: cccsen ccc qebs cobdidees Lec ncumesicinginaacesaneulemonesenssreee aes Sesame Rema 1.90 
Gy PG) Zblscscceresniccseasenientaeardensteannccs Sete ccaicietencisiantdle ee eimcewldeeneearegees undet. 
PETZITE. 
From the Norwegian mine, Calaveras County, California. Collected by F. L. 
Ransome. Sp. er., 8.925 at 23°. Analysis by W. F. Hillebrand. Formula, 
Au,Te.3Ag,Te. 
A Gietdccccsciaiale epensendinresiccreissidld darcamialh cis mamas epitinartace eee resekesw see ouGane OseeGscmese se 41. 87 
WU iene ves eweeewe de epemcdinwiganaen aytiezews nce dee See eeeee TeRe esos Hee CERES REESE 25.16 
NOs ny doe eben sequal see bac aees exec edet atarels Seana tise eer eee renin Sea areas 33. 21 
BOs eceercteig Senco wtals sh ok See ee Geass Sey een ome eee soem ieee siden peienicts trace 
MG ese cei ccrndenO de taiomne iaik aus esate oelsiniense aay eet Cee en a ees ereen eee S 08 
SYLVANITE. 
From the Elkton mine, Cripple Creek, Colorado. Analysis by W. F. Hillebrand. 
Approximate only. 
Ape cease dacs daredeoeieeeai acing 0s Ge Gaede Be SRA Redaereeis eve de Sear ceeeasiese ales 11.0 
IRD sheila cis sx iets ice pastes a Rc Lie aeo Reoutaes on HH ODO NOS Rae eee peters 26.7 
BD 6 epee ra yaad Sesefcir natd cc etann oree SRA RHEE eA Seen cee Sata iguagduanes 62.3 
100.0 
CALAVERITE. 
From Cripple Creek, Colorado. Collected by R. A. F. Penrose, jr. Analyzed by 
W. F. Hillebrand and described by him in Bull. 167. . 
A. From the Prince Albert mine. Corrected sp. gr., 9.6 at 24°, 
B. Raven mine. : 
C. C. 0. D. mine. 
