SALMON — ON ROCKS. 
53 
List of Elements and Binary Compounds, either being themselves 
Bock-forming Minerals, or forming Constituents of Rock- 
forming Minerals. 
Those marked with an asterisk (*) are minerals,— tha,t is, occur naturally ; those 
with a double asterisk (**), abundantly. The others form the chemical consti- 
tuents of minerals, but are not minerals themselves. 
O 
Oh 
O 
>^ 
<! 
w 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
21. 
** Carbon 
*Sulphur 
**Water . . . 
*Alumina . 
Lime .... 
* Magnesia . 
Baryta . 
Potash . 
Soda .... 
Lithia 
**Silicic Acid . 
Carbonic Acid . 
Sulphin-ic Acid 
*Boracic Acid . 
**Sesqui-oxide Iron 
Protoxide Iron . 
*Sesqui-oxide Manganese 
Protoxide Manganese 
** Chloride Sodium 
*Fluoride Calcium 
*Bi-Sulphide Iron . 
?2 
<1 
o 
.0)0) o 
1-73 -TS ^ 
(■c '5 '5 13 
Chemical 
Abbreviated 
Mineralogical 
Symbol, 
Symbol. 
0 
c 
a 
HO 
H 
APO' 
Ai 
CaO 
Ca 
MgU 
Mg 
BaO 
KO 
K 
NaO 
Na 
LiO 
Li 
SlU 
bl 
CO' 
c 
so^ 
s 
BO^ 
B 
Fe^O' 
Fe 
FeO 
Fe 
Mn^O' 
Mu 
MnO 
Mn 
NaCl 
NaCl 
CaFl 
CaFl 
FeS' 
Fe. 
Carbonic and Sulphuric acids also occur naturally in volcanic regions, in the 
form of gases. Lime, Magnesia, and Baryta are also called Alcaline Earths. 
XIV. Of the elementary bodies it therefore appears that only two 
— carbon and svJphiir — are found as minerals in any considerable 
quantity. In composition they are unimportant in rocks, except in 
the binary compounds given. 
Of the binary compounds also there are proportionately few which, 
directly as minerals, have an important share in the formation of the 
