254 Third Supplement to Dana’s Mineralogy. 
Ervsescrre [p. 38]—Analysis of ore from Coquimbo in Chili by W. Bécking 
(Ann. Ch, u. Pharm. xevi, 244) :—Sulphur 25°46, copper 60°80, iron 18° 67==09'93. 
Feupsrar [p. 228, and Suppl. 1, 11].-Analyses (1 to 4) of Glassy eer by 
Dr. G. Lewinstein (Ueber die Zusamm. des Glas. Fel dspaths, etc., posh , 18 56). N 
1 from volcanic sand, 2, 8, 4, from trachyte and trachytic conglomerat: 
Si xi #e Ga Mg Na K 
F. cee Eifel, Hs 65 1891 —- 149 076 445 '774=100 G.=2578 
28 883 —— 042 O81 115 131 
2. ee 8 ve. . e 091 1:05 O88 249 11°79==100 
Oxygen, 3030 029 035 064 1-96 
3. Drachenfels, res $61 1645 158 097 06538 204 1234100 G—=2°60 
Oxygen, 3440 769 047 027 0°20 052° 217 
4. Pappelsberg, [6603] 1787 052 047 019 608 886=100 G=2616 
Oxygen, 8428 835 016 013 O07 155 1:50 
In No. 3, the silica as directly determined equals 66 
The analyses give quite closely the tenia nse R Si+8 Sis. | If the iron 
be taken‘as protoryd, the well to the formula 9R Si+7# Si*. 
Heusser refers the Hyalophan of Walters — ~ ppl 1], to Adularia 
es with 
in ifferent ¢ m 
te blowpipe, she found — tale os om Moreover dotainit and heavy 
often occur as other impurities and partly may account for some of the resaltalt 
the analysis. 
The Weissigite of G. Jenzsch has afforded him (N. Jahrb. f. Min. ete. 1855, 800): 
Si Al Mg Ca K Li FI, loss. 
a. 65-00 19°54 161 0-19 12°69 0:56 0°35 ==99°94 
, * 65°21 0°55 
aloidal cavities, in layers with chaleedony, etc. 
No. 1 is rion the sida or otis. of two layers, the color flesh red ; 2°551— 
nya oti i ria is from a second a ay” color paler rose-red to Meddich-white ; a= 
— ge! aes or the proto: be ds and sili No 1 
315: oa 33°75, cheno te i“ go Pe of i ee No, 2 
is a pera Hy after Laumont tite. 
nalysis of No. 1 above comes nearest to the feldspar of Radeberg (see 
Suppl a, Prose feldspar). 
The same amygdaloidal cavities contain the chlorophanerite and the weissigite. 
Bischof rdbaiied (Lehrb. Geol. ii tee from a feldspar pseudomorph after 
ba from the Kilpatrick Hills "(whe e others occur with the form of anal- 
i Pe a 6. Mg =—* "Nes 
6200 2000 064 060 trace 1654 1-08 08% 1019 
Oxygen, 32:19 935 - O19 17 261 O27 
Ferausontte.—See Trrire, this Supplement. 
FREIsLesenite [p. 79].—A ie which has been referred to Freislebenite and 
is probably near Bournonite, scribed as new by — in eo xeviii, 165. 
—. rs 7 tables (2 paieiaens thick and a oss) of the mono- 
day em, with two planes making up each margin of the ‘ible. Acute plane 
angle o ear about rt Pa. ==? 6. G=6 a 2606. Color iron th streak black. Brittle. 
BB. fuse asily to a black chining globule and yields finally a globule of silver. 
bere silver soneticuten oo i a cent. The charcoal becomes covered with fumes 
pa ae. the mineral probably consists-of silver, lead, antimony; 
