108 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 1 
Ti0 2 . P 2 0 6 . 
h 2 o. 
A1 3 0 3 . 
FegOg. 
FeO. 
MgO. 
CaO. 
NajjO. 
K 2 0. 
Total. 
Sp. Gr. 
19 
a b a 
a b a 
2-5 
63 
•1 
•6 
6-8 
4-5 
100*2 
5-8 
53 
*1 
2*1 
7-5 
43 
100*0 
2*47 
•1 
11-3 
49 
4-3 
1 
•5 
6*1 
4-4 
100*5 
5-2 
•5 
•9 
■3 
7-5 
100*7 
2-2 
•8 
1-5 
7-2 
2-9 
100T 
2*68 
2-3 
1-1 
34 
3'4 
100*8 
7-7 
11-4 
2-9 
•8 
4-3 
1-8 
49 
100 8 
63 
•5 
•9 
•6 
5-4 
100*4 
•2 
10-4 
6-3 
4-2 
•3 
1-5 
7-6 
4-6 
100*0 
•3 
14-6 
1*5 
5-9 
1-6 
4*6 
4-9 
2-0 
100*0 
•7 
14-8 
1-8 
56 
1-6 
3-2 
5-7 
30 
100*0 
63-1 
2 0 
16-0 
4-3 
1*5 
2-1 
4-4 
3-9 
2-7 
100*0 
629 
1-4 
14-8 
92 
•4 
36 
4-0 
2*9 
99*2 
62-0 
(3-2) 
17-0 
7-0 
l'O 
35 
4-0 
2-3 
100*0 
2*65 
14 rocks 
659 
■1 
1-1 
12*6 
5-5 
3'0 
•9 
2-3 
5-4 
3-4 
100*2 
2*60 
±3*0 
± 
i-i 
1-7 
L*9 
(^9*7) 
20 
a b a 
a b b 
66 0 i 
1-1 
133 
8-4 
2-2 
1-6 
34 
4-7 
100*7 
64-8 
1-8 
180 
56 
2*2 
2-3 
1-6 
2-5 
100*4 
2*73 
64*5 
•6 
16-9 
6-2 
3-1 
2*5 
1 2-2 
39 
99*7 
64-4 
•8 
14-1 
6'1 
4-0 
2-0 
4-5 
•6 
37 
100*2 
63-8 
2-8 
17*6 
30 
33 
34 
2-5 
1-8 
2-4 
100*5 
630 
2-8 
13-4 
35 
53 
•6 
1-3 
5-2 
100*5 
62-3 
2-2 
14-1 
8-2 
34 
1-3 
35 
61-8 
1-2 -2 
2-7 
14-8 
1*8 
53 
2-7 
•7 
36? 
45 
99*6 
2*66 
61-5 
3-0 
163 
4'4 
4-0 
30 
3-1 
2-8 
16 
99*7 
61-4 
23 
16'7 
7-5 
37 
2-1 
4-8 
2-9 
101*4 
61*4 
1-0 3 
34 
14’5 
20 
5-8 
20 
1-3 
39? 
4-7 
100*2 
2*66 
609 
1-5 
12-4 
11-7 
2-0 
1-7 
4-0 
5-3 
99*5 
60-6 
3'2 
18-0 
7 3 
1-4 
2*4 
2-4 
3-8 
99*1 
59-1 
1-5 
14-5 
12-3 
20 
4-0 
6*6 
100*0 
2*68 
59-0 
3-3 
157 
11-7 
•8 
32 
5-4 
*7 
99*8 
58-6 
1-4 -4 
5*1 
15-3 
5-6 
33 
30 
1-0 
2-4 
3*8 
99*9 
2*67 
58-2 
2-1 3 
(3-3) 
15*5 
6*5 
2-0 
2-6 
4-4 
30 
2*6 
100*5 
57-9 
•4 -4 
1*7 
16-5 
66 
2-4 
46 
3-7 
36 
1*6 
99*4 
2*93 
18 rocks 
616 
•3 -1 
2-4 
15-4 
2*6 
2-5 
2-2 
33 
36 
100*0 
2-72 
±1-6 
±1*4 
= 1-3 
= 1-4 
± 
] *8 
1 ±7 ' 5 
Classification of Igneous Rocks. 
109 
1907-8.] 
—continued. 
tf. Jahrb., 1904, vol. ii., p. 58. 
H. Furstner, Z.K., viii., p. 179, 1884. 
N. Jahrb., 1905, vol. i., p. 247. 
iV. Jahrb., 1901, vol. i., p. 63. 
H Furstner, Z.K., viii, p. 186, 1884. 
iV. Jahrb., 1895, vol. ii., p. 100. 
N. Jahrb., 1904, vol. i., p. 53. 
iV. Jahrb., 1901, vol. i., p. 63. 
N. Jahrb; 1904, vol. ii., p. 58. 
N. Jahrb., 1905, vol. ii., p. 75. 
N. Jahrb., 1905, vol. ii., p. 79. 
! Q, Jowm., 1890, p. 349. 
Rhyolitic obsidian. 
Pantellerite. 
Liparite (mean 4, 5). 
Quartz keratophy re (mean). 
Pantellerite. 
Kersantite. 
Syenite porphyry. 
jEgirine trachyte. 
Phonolite obsidian. 
Augite andesite. 
Gneiss (mean of 2). 
Propylite (hornbL mica 
andesite). 
Br. E. Africa. 
Pantellaria. 
Somali Desert. 
Bukowina. 
Pantellaria. 
Croix de fer Dauphiny. 
Malenic, Bohemia. 
Siebenbiii'gen. 
Br. E. Africa. 
Marian Island. 
Schapbach, Black Forest. 
Washoe. 
Q. Jowm., 1890, p. 349. 
Hornbl. propylite (T. H. 
Holland). 
Mull. 
A Geikie, p. 166, third edit. 
Trachyte, average. 
N. Jahrb., 1895, vol. ii., p. 100. 
N. Jahrb; 1902, vol. ii.,-p. 231. 
Q. Jowm., 1900, p. 686. 
Kersantite. 
Hornfels granulite. 
Trachyte. 
Croix de fer. 
Borry Mts. 
Newtown Head, Co. Water- 
ford. 
C. Chelius, Erl. G. Kt. Hesse, V. Bl. Bmsbach, 
Granite. 
Hessen. 
p. 24, 1897. 
A. Ossan, Z.D.G.G., *1., p. 701, 1888. 
N. Jahrb., 1893, vol. ii, p. 347. 
N. Jahrb., 1895, vol. ii., p. 99. 
N. Jahrb., 1893, vol. ii., p. 99. 
Cordierite andesite. 
Quartz syenite. 
Orthophyre. 
Augite porphyrite. 
Basic tuff. 
Mica syenite. 
Spain. 
Fourche Mts., Aik. 
Chateau noir. 
Siipplinjpn. 
Q. Jowm., 1883, p. 296. 
J. M. C. Henderson, Z.D.G.G., xlvu., p. 539, 
Saxony. 
1895. 
N. Jahrb., 1893, vol. ii., p. 99. 
N. Jahrb; 1895, vol. ii., p. 99. 
Augite porphyrite. 
Orthophyre (mean of 3). 
Altonhausen. 
Chateau noir. 
Q. Jowm., 1895, p. 192. 
Q. Jaum., 1895, p. 192. 
Q. Jowm., 1895, p. 192. 
Minette. 
Tachylitic rock. 
Augite porphyrite (Weis- 
selb.), see Rosenbusch, 
Nair Point, Porthalla. 
Garn Fawr, Fishguard. 
F. Klockmann, Jb. Pr. G.L.A. , 1890, xi., p. 210, 
p. 501. 
Porphyrite. 
Near Magdeburg. 
1892. 
N. Jalvrb ., 1900, vol. ii., p. 221. 
F. Y. Wolff, Z.D.G.G., li., p. 502, 1899. 
Porphyrite. 
Augite porphyrite. 
Gaflasion. 
Chile. 
& __ 
