y 
+f 
238 J. D. Dana on the Isomorphism and 
4, Light = segs! Ore, 3AgS8+As 83; R: R=107°36’. 
0°00 6. atoms of hens and acid, 2. ¢. atoms of elements, 10. 
: Ps Panes A. 6190:08-—5°5=1125 
658 1200°00 B, 1125—+-2—=562°5. C. 1125+10==112°5. 
a. At. weight, 6190-08 0’, 1125-11 (if As is fou pont 8 
5. Dark Red ee be 3AgS-+S8b 83. 
A. 6362'80+5'8 (sp. er) =118 
gb agen ap eS 3 
a. At. weight, 6862°8 
C in nitrate of soda and carbonate of manganese (which are 
nearly alike in angle) isas 2:3. Carbonate of 3 zinc, isomorphous 
with carbonate of manganese, has C =35°5, the angle R: R being 
a degree larger. The relation between Ci in carbonate of zine 
and light red silver ore (in which the angle is nearly the same ) 
approaches closely 1: 3, three times C of zinc being 106°5, 
while C in the silver ore is 11 
XXII. Arragonite, M:M, 116°10’—White Lead ore, 117°13’—Strontiamite, 
117°19’—~ Witherite, 118°30'——Nitrate of Potash, 119°—Bournonite, 115°16’. 
1. Arragonite. 
1 Ga = 35149 6. atoms of acid and base, 2. ¢. atoms of elements, 5. 
6 
16 275° A. 626°99--2-93 (sp. gr.) =21 
a. At. weight, 62649 B. 216+2—108 O. 216-5132 
2. White Lead ore 
1Pb =13945 A. 1669:5-—~6°6 (sp. er.) oo 
2 2750 B, 258+2=126%5 53-+-6=50°6 
a. At. weight, 1669-5 
3. Strontianite. 
18 
care A. 922°3~3-66 (sp, i a 27 
16 215 = B, 259-9196 Sion sdlclee 
922°3 
4, Witherite. 
1 Ba = 9565 A, 12315+43 (sp. ey ==286'4 
1 275° ~=—-B. 286-4+2—=143-9 286°4—-5=57'8 
12315 
5. Nitrate of Potash. 
== 58886 6. atoms of acid and base. ec. atomsof ae 8 [or 9]. 
25 
18 675-06 A. 1263-92~1-937 (sp. gr.) =6 
a. At. weight, 1263°92 B, 652°5—-2-—=-326-2 ©. 6525-88156 
6. Bournonite 
6 Cu =2370- c. atoms of elements, 33. 
6Pb 7767: A. 18585:-4+5°766 (sp. gr.) =3223°3 
3Sb 4848-4 C. 8223°3-+33=97°5 
18S 3600 =————s«[8298°3-+36 (Sb being double) =89°5] 
a. At. weight, 185854 
