204 Second Supplement to Dana’s Mineralogy. 
Scheerer by his theory (taking 3% = in ot 3H =1Mg) makes out the formule 
ar SEAS palais ed hombende form 
ned is near that of “Epidote the propriety of calling ye 
species Sedbiiets waar ie speatinas ned,—s. D. D.] 
Norpensst6.pirs is identical with Tremolite, (Kenngott, Sitz. Wien, Xi, 297.) ‘ 
HypersTHene, see Pyroxene. 
Tpoorase [p. 197].—Analyses and phere pu by Rammelsberg (Pogg. xciv, 92) 
—the results here cited, mean of 2 or 3 analyse 
Mg K 
Z Vesuvius, ywh-bn, 37°75 1728 443 37°35 $79 — =10055 G=33 
' . dull bn, 37°83 1098 9°03 35°69 437 —- = 9790 G=3 126-5420 
ye Monzoni, ywh, 38:25 15°49 2:16 36°70 4:31 0-47 == 97:38 G=3344 
. : r 37°56 11 s 729 86°45 5:33 = 98:24 G.==3.385 
5. Dognazka, 8715 1552 485 36-77 542 035 =10006 G.=3378 
Braap le a 39°52 181 8-04 35°02 154 132 = 9875 G=341l 
7 Egg » con 37-20 13°30 842 34:48 422 031 Ti151=—99-44 G.=3436 
8. Eger, 8788 1448 7-45 84:28 430 — Fe0-45=98:'89 G,=3'384 
9. Sanford, Me., 37°64 15°64 6-07 35°86 2:06 — Ti2-40—99°67 G==3434 
10. Wilui, 0 10°51 7:15 35°96 770 —- = 99°72 G.=3'415 
11. a 8715 13-44 647 ieny 2°87 ‘08 == 98°97 G.=3-407 
cen” When Pig 
the protoxyda and eamerds 3 25: 25=—21 : 1) “Tammelste also shows that y re- 
ga my iron as oxyd 
The 2s Tae may. pony be present as fig instead of akand Loc. Ducktown, 
" Behecrer Gres ==3°359. Form - pedis a 8 0, bd ga dag hy % neriy pacar 
Si Po M ‘a V 1 
37-38: ; 85 9:28 ry “4 ce 603 273-0015 = Bye 
st 9°36 4-11 1:67 undet. =100°16 
“73 8 18 49 : 95 ost 7 9° 1:98 1:89 undet. panctan 99°95 
“for H, R, B, = is 186 : 11-86 : 8:28 : 19°53, os the 
water, the oxygen ratio for R4+H d Si is very nearly 1:1. Taking 566°25 as 
the ee of = the ratio fee 1:86 : 11°86 : 8-28 : 19°93, me oh is still 
ne’ —J. | 
| 
r makes ‘out, by his polymercus isomorphism the angitic formula | 
rick 
e of welt: in ‘Tdocrané hhde been determined as follows by -G. 
©... : 
244 0-15 2. Vite green, 029 —_undet. 
2°98 undet, brown, 1°79 0-06 
4 8p Pee pave te Tt 08 
The loss Sohal ignition for several Idocrases was as follows: : 
a 8, 2:10 p.c.; Banat, 241, 241; Wilui, 0-73; Egg, ne neat ioe 
+ i brown, 2-38, 216; Ala, ig 
O05 
c structure of songs A shown a subjection to flaohydric 
talcose -" Min. Not,, No, 16. 
