250 ANALYSES OF ROCKS AND MINERALS, 1880—1908. 
FLUORITE. 
From Franklin Furnace, New Jersey. Partial analysis by G. Steiger, on insufficient 
material. 
CRYOLITE, 
From St. Peters Dome, Pikes Peak district, Colorado. Described by Cross and 
Hillebrand in Bull. 20. Massive. Pinkish in color. Sp. gr., 2.972 at 24°. Analysis 
by W. F. Hillebrand. 
A pe aoe tery vy reins SARI Sah ay ects av Date cpu detanata anardad Ait aoe acap ae niinninsetie Ne ROC EMRE ieee mea, 12.81 
IN Bcs.s = sie cresayatanatchsceiatein ani A SieteriecSee Sie avec reve ypeere were piel eaersiedticin See Siemeimieln's entire nmeib eis - 32.40 
Caisceiarcictstsisitans aersiasacm ccbesassamians ae ein Bee eeu Baa ae re bpamiisteleisisiehed fief ence die - 28 
AB peara's Sobers arrose reais Saing FEAR hE See etmas ee toeeraebnds MiGecauts anced 53. 55 
Wey Ogu tierezaacsoaieess oes sae onto seemcineane 26 aes RoR OSE SERS Awd aeemEeS 40 
DeO evcsseic seer rwdwevegeewaisicsd qoeieccman: yatcntomoes teas tea eRe Ree REE . 30 
-99.74 
PACHNOLITE. 
From St. Peters Dome, Pikes Peak district, Colorado. Described by Cross and 
Hillebrand in Bull. 20. Analyses by W. F. Hillebrand. 
A. Compact bluish variety. Sp. gr., 2.980 at 22°. 
B. Crystalline coating. 
C. Fresh, transparent, crystalline material. 
D. Carefully selected crystals. Sp. gr., 2.965 at 17°; 2.962 at 22°. 
A. B. c. D. 
12.93, 12.92 | 12.14 12.27 
15.27, 15.17 | 18.06 18. 04 
158) ©" rceeaebed veal Oeenenss 
10. 28, 10. 23 10.25 
+13 
8.64, 8.79 | 8.10, 8.11 8.05 
by gceceasSlajaigjcteigheid 51.33, 51.28 | 251.39 
SicdGeeateanies pete se adauaced 99. 86 100. 00 
a By difference. 
ELPASOLITE. 
From St. Peters Dome, Pikes Peak district, Colorado. Described as a new species 
by Cross and Hillebrand in Bull. 20. Incomplete analysis on insufficient material, 
by W. F. Hillebrand. The fluorine was deduced by calculation on the assumption 
that the metals are fully combined with it. 
