282 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
PTILOLITE. 
Described as a new species by Cross and Eakins in Am. Jour. Sci., 3d ser., vol. 32, 
p. 117, and vol. 44, p. 96. Analyses by L. G. Eakins. 
A. From Green Mountain, Jefferson County, Colorado. 
B. From 3 miles south of Silver Cliff, Custer County, Colorado. 
' 
\ B. 
Bese wach cccsa nga wd raed id base ade deaiad aided Hel velo edes atbialeabehass accu cgtranlel 70. 35 67. 83 
IAVRO ae sisi assess 11.90 11. 44 
OO ja syssencescscetond aie lar veda Eacebudse uh Geenarn in ie Be Sein Sinise AVES TRIE Oran mM emtaememeeente 3. 87 3. 30 
K20 2. 83 . 64 
Na2O....- aU 2. 63 
HO at 110° 3. 62 
H20 at 125° 10.18 1.31 
H20 at 300°. . 2 ‘ 5. 41 
© sab TC CHESS ogre ese eps tnawisrees nic fsa ie PiciesnBiSicicie ih Hi eecasl hese Galen winie swirler aad exes 3.10 
99. 90 99. 28 
HEULANDITE. 
A. From Green Mountain, Jefferson County, Colorado. Analysis by L. G. Eakins. 
B. From Anthracite Creek, Gunnison County, Colorado. Analysis by L. G. Eakins. 
Sp. gr., 2.24 at 20.1°. 
C. From Berufiérd, Iceland. Analysis by George Steiger. 
A B. Cc 
(0) poe 59.17 | 57.38 57.10 
Alz203- 16.80 | 17.18 16. 82 
FRO Ob nex saeseeg ci cereus ok a oss Pies Bini oes i in sacise ineieicloas wi oack oi Suni giaeIaNS Take S SE REReIAIn [aS trace |scc 2s. 
SMA Oh 5 0 sence eich Sumi casa oHEG Ld Wis che esas GSI SSIs Sadi epe Ages | EIS ISIE low 07 
OOK pai2 ies etiaachal ccrcnaliss i leicisiid us ointeen on reheat ebal ese me nsleisier oo deE niga Neaaaaaceane 7.10 8.07 6.95 
Tyas 2 sgh cease fsencas ais aS Sees cgeeetcncns lao pias aia GOL iatoaied eee CC Patt SE | Seas Sere ee 46 
Na2O........ os sees bed a parece ce ataueen 1.37 - 82 1.25 
Res Oho ide saree daaewe eeeeien! See, cin shia atovare in nee mints 84 -40 42 
sO at 00 ccm seaneysiecavsvereios ei = atctats siaprararcsaseor gare Sriasaase ) 2. 57 3.61 
H20 at 125°... . fs 15. 45 1.10 
H20 at 300°... -. 11.70 13.00 
Ha Oatired ness oz, svc seavem uments vemseewasmien se xn eamareaeecn Pee ekteeleees -90 
100. 23 | 100.12 99. 68 
STILBITE. 
A. From Wassons Bluff, near Parrsboro, Nova Scotia. Analysis by George Steiger. 
B. From Italian Mountain, Gunnison County, Colorado. Analysis by L. G. Eakins. 
C. From Table Mountain, Golden, Colorado. Described by Cross and Hillebrand 
in Bull. 20. Analysis by W. F. Hillebrand. 
BLO ABOVE OO oc jeetiei ese neces cntenk aviieadiomaemnemad soeencciuccuoneen 15.41 \ ina} 18. 16 
