104 Proceedings of the Royal Society of Edinburgh. [S< 
List of 1000 Rocks 
Group. 
Si0 2 . 
TiOj. 
PA- 
h 2 o. 
AljOj. 
Fe 2 C>3. 
FeO. 
MgO. 
CaO. 
NajO. 
K,0. 
Total. 
Sp. Gr. 
13 
68-7 
•3 
•6 
17-1 
•9 
•4 
•4 
2-3 
7-0 
38 
101-5 
686 
•4 
(1-9) 
165 
•9 
11 
•2 
4-2 
1-9 
5-6 
101-8 
68-2 
1-4 
169 
1*6 
11 
22 
5-3 
30 
99-8 
Rft-n 
•7 
17-5 
•4 
•5 
5*8 
7-1 
999 
2-60 
67-5 
•5 
178 
2-5 
•1 
•4 
1-7 
5 0 
4-4 
999 
66-3 
•2 
1-3 
176 
2-2 
•6 
1-0 
31 
5-2 
2-5 
100-0 
65-9 
•4 
1*4 
16-8 
1*6 
1-2 
1-5 
2-7 
4*7 
3*2 
994 
2*62 
65-6 
'9 
17-2 
•2 
3*2 
1-4 
34 
3*8 
31 
98-8 
65 ‘5 
IT. 
19-9 
1-6 
1-4 
2-0 
5-8 
2-4 
100-2 
11 rocks 
67 ‘8 
•1 
1-0 
16-9 
1-2 -6 
•7 
2-4 
4-9 
4-5 
100-0 
2-61 
± 
•5 
±1-0 
=*= 
•9 
' ? 
L-l 
* 
1*8 
rfc63 
14 
a abb a b 
69*2 
•8 
15'6 
1-1 
1‘3 
•1 
1-3 
1-7 
8-9 
99-9 
66*7 
•8 
13-6 
s 
•7 
1-0 
5-8 
9'0 
101-0 
66-3 
18-8 
1-4 
•5 
1-2 
30 
8-8 
100-0 
658 
1-9 
15*9 
5-1 
1-7 
3-5 
6*2 
1000 
2-68 
65-7 
11 
179 
43 
*5 
1*3 
5*7 
3*5 
100-0 
2-50? 
65-4 
1-8 
17-1 
1‘7 
1-1 
2‘5 
4-8 
6-9 
101-7 
65*3 
2-1 
159 
1-2 
2-2 
1-5 
30 
2-8 
5*7 
101-0 
2*56 
640 
20-4 
2-8 
1-3 
4-5 
3-3 
3*5 
99-6 
638 
•2 
•4 
17-4 
•1 
1-5 
■9 
1-7 
6-0 
99-3 
62-7 
1-7 
17*3 
•5 
23 
1-4 
32 
4*5 
63 
611 
35 
18-6 
2-6 
1*1 
2-9 
3*2 
6-8 
99-8 
2 '59 
11 rocks 
^7 
•1 
1*3 
17-1 
if 
1*3 
•8 
2-2 
4-1 
65 
100*2 
2-60 
L-5 
±1-4 
* 
•8 
1-3 
± 
16 
±6-6 
15 
a ah hi a 
64-5 
198 
22 
•2 
1-0 
•6 
4-1 
7-6 
1000 
61-9 
1*4 
182 
•3 
2’9 
10 
1-7 
5-5 
62 
99-5 
60-4 
•6 
22-6 
*4 
2*3 
•1 
•3 
8-5 
4-8 
100-0 
2*75 1 
60-1 
1-2 
•1 
1-6 
20-0 
2-4 
1-3 
•8 
•9 
63 
60 
100-7 
59-4 
•5 
(•5) 
18-4 
43 
•4 
•6 
2*2 
4-7 
67 
98-3 
58-3 
5-9 
20-9 
4-2 
11 
2*2 
39 
100-5 
58-2 
1*7 
232 
1-5 
2*4 
66 
100-5 
•2 
3*2 
17-5 
3-5 
1-2 
•2 
1-4 
5-8 
9-2 
99-9 
57-4 
•4 
1-7 
23-1 
1-9 
*1 
1-7 
8-1 
5-7 
100-2 
65-7 
43 
20 6 
3-1 
* 4 
1*4 
7-1 
5-6 
98-3 
?" 
10 rocks 
59*5 
■2 *1 
2-1 
20-5 
2-4 -8 
( -5 
1-5 
61 
6-2 
99-9 
2-75 
* 
1-6 
±1-7 
= ■9 
t-6 
* 1*3 
±6 -l 
Classification of Igneous Rocks. 
105 
1907-8.] 
conti/nued. 
X Jahrb., 1904, vot ii., p. 400. 
.V. Jahrb., 1900, voL ii., p. 221. 
O. Nordenskjold, B.G. Inst. Un. Ups., i., p. 
177, 1894. 
Q. Joum., 1895, p. 177. 
W Cross, 17, A.E.U.S.G.S., ii., p. 324, 1896. 
J. S. Dffler, B.U.S.G.S., 148, p. 191, 1897. 
Weed and Pirsson, B.U.S.G.S., 139, p. 106, 
1896. 
jV. Jahrb., 1902, vol. ii., p. 390. 
.V. Jahrb., 1893, voL ii., p. 90. 
Red granite. 
Quartz porphyry. 
Quartz syenite porphyry. 
Pot. soda felsite. 
Mica dacite. 
Dacite porphyry. 
Porphyry. 
Hyaloplasm dacite. 
Granitite. 
Osteroe, Norway. 
Storflasen. 
Sweden. 
Goodwick, Pemhrokesh. 
Colorado. 
California. 
Montana. 
Chrety, Russia. 
, Saxony. 
B. Frostems, T.M.P.M., xiii., p. 188, 1892. 
N. Jahrb., 1905, vol. ii., p. 219. 
N. Jahrb., 1900, vol. i., p. 27. 
R. Zuber, Sb. Wien. G.R.A., xxxv,, p. 750, 
1885. 
Roth, Zeitsch. d. d. geal. Gesell., 1866, p. 623. 
N. Jahrb., 1905, vol. ii., p. 219. 
J. F. Williams, N.J.B.B., v„ p. 411, 1887. 
iV. Jahrb., 1900, vol. i., p. 224. 
N. Jahrb., 1901, vol. ii., p. 239. 
A. Verri, B.S.G.Ital., viii., p. 403, 1889. 
A. Geikie, p. 165, third edit. 
Granite. 
Syenite. 
Leucite granite porphyry 
(red to 100). 
Quartz porphyry. 
Trachyte. 
Syenite. 
Trachyte. 
Banatite. 
Pyroxene syenite. 
Trachyte. 
Porphyry. 
Finland. 
Monzoni. 
Tocos de Caldes. 
Monzoni. 
Tuscany. 
Kullen. 
■ Kuusamo, Finland. 
Viterbo. 
Pieve di Cadore, It. 
-V. Jahrb., 1903. 
iV. Jahrb., 1905, vol. i., p. 437. 
Bull. U.S. Geol. Sun., No. 148, p. 65. 
H. S. Washington, J.G., ix., p. 610, 1901. 
N. Jahrb., 1892, vol. ii., p. 255. 
N. Jahrb., 1892, vol. ii., p. 418. 
B. Jahrb., 1892, vol. ii., p. 418. 
Weed and Pirsson, A.J.S., ii., p. 192, 1896. 
N. Jahrb., 1892, vol. ii., p. 418. 
Merrill, p. 217. 
Trachyte. 
Pulaskite. 
Elaeolite Byenite. 
Foyaite. 
Trachyte. 
Trachyte pumice. 
Trachyte pumice. 
Tinguaite. 
Trachyte. 
Phonolite. 
Celebes. 
Madagascar. 
Maine. 
Arkansas. 
Monte Santo, Naples. 
Laacher See. 
Laacher See. 
Montana. 
Laacher See. 
Bohemia. 
