124 Proceedings of the Royal Society of Edinburgh. • [Sess. 
List or 1000 Rocks 
Group. 
Si0 2 . 
TiO a . 
P 2 0 6 . 
H 2 0. 
A1 2 0 3 . 
Fe g 0 3 . 
FeO. 
MgO. 
CaO. 
Na 2 0. 
k 2 o. 
Total. 
Sp.Gr. 
35 
51-0 
■ , 5 
3-9 
15-6 
8’5 
1-4 
5-2 
6-5 
31 
3-4 
998 
50 7 
1-9 
2-0 
14-8 
35 
9-3 
59 
8-2 
2-8 
1-4 
100-5 
2-94 
50-3 
1-3 
■9 
13-6 
10-8 
65 
23 
7-1 
4-2 
1-8 
98-8 
2-88 
49-2 
1-8 
1-5 
2-7 
15-8 
61 
7'5 
30 
5-3 
5 2 
2-1 
100-5 
2-79 
49-1 
4-3 
17-2 
■5 
12-2 
3-6 
97 
29 
99-9 
46-8 
2-3 
1-0 
52 
149 
7-8 
5-2 
2*9 
6-4 
5 0 
2-4 
99-9 
53-2 
•7 -3 
2-1 
15-9. 
60 6-5 
35 
6 ’ 5 , 
38 
1-6 
100-1 
2-88 
± 
1-8 
±1-1 
± 
1*7 
± 
1-9 
10 
±7-5 
36 
i«. 
a b 6 
58-6 
•6 
229 
2-5 
7’0 
4-0 
1-7 
3-2 
•5 
101-0 
2-85 
58-0 
•4 
22-2 
2-0 
7-2 
3 8 
2-2 
3 2 
•7 
99-7 
2-85 
55-9 
151 
15-2 
4-2 
65 
2-5 
•9 
100-0 
55-9 
•8 
12-6 
6 5 
10-2 
6-2 
35 
22 
•7 
99 4 
55-4 
•8 
1-6 
20 0 
2-7 
5-1 
66 
36 
3 0 
1-9 
100-7 
54-0 
17-0 
120 
6 0 
7-0 
2-0 
2 0 
1000 
2*95 
52-3 
•4 
18-4 
5 9 
11-1 
1-0 
73 
2-9 
•5 
99-7 
51*4 
1 
•7 
18-2 
14-5 
31 
103 
•8 
•2 
99-3 
51-3 
50 
20-4 
3 0 
4-1 
7-2 
4-5 
1-8 
2-9 
100-3 
2-84 
509 
•5 
•8 
20 
14-4 
2-6 
6-9 
34 
1-7 
100-7 
500 
2-0 
160 
140 
50 
40 
10 
100-0 
2*98 
49 6 
2-1 
1-2 
15 6 
8-8 
4-7 
71 
8-1 
2-2 
1-1 
100-4 
2-93 
493 
•3 
2-9 
16-9 
6-5 
69 
4-8 
7-6 
3 4 
•7 
48-3 
39 
18-5 
145 
4-5 
5-4 
3 4 
1-8 
100-3 
46-9 
3-2 
1*1 
16-7 
11-4 
56 
36 
6-1 
3-9 
99-2 
423 
2 9 
•3 
6-0 
169 
5-2 
11-1 
6-9 
33 
40 
•8 
99-8 
1 rocks 
519 
•6 -2 
1-7 
17-8 
6-9 
64 
4-8 
5-8 
2-9 M 
99-9 
2-90 
±2-3 
±2-0 
± 
2-6 
± 
2-0 
±•8 
±9-7 
37 
b a a 
baa 
60-5 
•5 
20-4 
1-5 
2-9 
2-9 
62 
3 5 
1-3 
99-8 
1-8 
20-2 
67 
1-3 
2-8 
1-3 
100-4 
58-4 
•2 
193 
5-8 
•6 
31 
6-8 
3 8 
2-3 
100-3 
58-3 
•2 
20-8 
2-6 
3-8 
2-6 
8-4 
4-2 
•7 
101-6 
2-82 
•2 
•3 
1-3 
19 2 
2-0 
32 
56 
4-5 
1-8 
100-8 
57 3 
•4 
(•5) 
24-9 
1-1 
•9 
•3 
8-0 
5 4 
1-2 
1000 
57 0 
•2 
•2 
17-5 
4-4 
32 
3 0 
1-2 
99-8 
565 
•5 
•1 
•7 
18-1 
4-3 
2-8 
4-5 
8-2 
32 
1-1 
100-1 
561 
5-1 
17-2 
4*8 
2-3 
11-2 
2-0 
1-4 
100-2 
56 0 
27'6 
•7 
11-9 
3-8 
•1 
101-7 
55 9 
•2 
27 
22-4 
2-5 
1*8 
30 
92 
1-8 
*4 
90-8 
(2*7) 
555 
10 
•5 
•7 
16-8 
41 
3-6 
3-0 
7-1 
4-3 
3-6 
100-2 
2-79 
551 
•7 
•4 
1-1 
20-3 
1*5 
4-4 
1-8 
43 
2-8 
100-0 
537 
•9 
•5 
4-9 
170 
5-0 
2-4 
1-8 
10-2 
3-5 
•8 
100-6 
2-74 
Classification of Igneous Rocks. 
125 
1907-8.] 
— continued. 
J. P. Iddings, M. U.S.G.S., p. 340, 1899. 
Q. Joum ., 1884, p. 654. 
iY. Jahrb., 1903-4, suppl. 18, p. 467. 
N. Jahrb., 1906, vol. ii., p. 71. 
N. H. Winchell, 21, A.R.G. Nh. S. Minn., p. 
151, 1893. 
N. Jahrb., 1903, vol. i., p. 430. 
Hornblende basalt. 
Enstatite diabase. 
Dolerite. 
Mugearite. 
Gabbro. 
Teschenite. 
Yellowstone Park. 
Whinsill, Northumber- 
Schwarzenfelsen. 
Skye. 
Minnesota. 
Aroostock County. 
R. Jahrb., 1900, vol. ii., p. 400. 
N. Jahrb., 1900, vol. ii., p. 400. 
Gentli, Ann. d. Uhem. u. Phann,, 1848, p. 22. 
N. Jahrb., 1901, vol. i., p. 72. 
N. Jahrb., 1904, vol. i., p. 65. 
A. Geikie, p. 165, third edit. 
W. S. Bayley, B. U.S.G.S., 150, p. 286, 1898. 
S. P. Smith, Eruption of Taarawera, Wellington, 
1887, p. 76. \ 
Q. Joum., 1883, p. 296. 
N. Jahrb., 1901, vol. ii., p. 59. 
A. Geikie, p. 145. 
Zeitsch. d. d. geol. Ges., xix., part ii., p. 315. 
N. Jahrb., 1905, vol. ii., p. 232. 
C. v. John, G.R.A., xxxiv., p. 121, 1884. 
A. Wichmann, Z.D.G.G., xxxvi., p. 494, 1884. 
H. E. Gregory, B.U.S.G.S., 165, p. 179, 1900. 
Norite. 
Norite. 
Andesite. 
Basalt slag (two spec.). 
Diorite. 
Diorite, average. 
Gabbro. 
Lapilli. 
Basic tuff. 
Konga diabase. 
Diabase, average, roughly. 
Anamesite. 
Basic diorite. 
Diabase. 
Mica porphyry. 
Diabase glass. 
Le Pellet, France. 
Le Pellet, France. 
Iceland. 
Konig, Karl Land. 
Steiermark. 
Minnesota. 
New Zealand. 
St. Davids. 
Molle. 
Hessen. 
Tanjaro. 
Persia. 
Nain, Labrador. 
N. Jahrb., 1901, vol. ii., p. 233. 
N. Jahrb., 1893, vol. i., p. 72. 
N. Jahrb., 1906, vol. i., p. 222. 
Geol. Survey, India. 
R- Jahrb., 1901, vol. i., p. 62. 
R. Jahrb., 1904, vol. ii., p. 399. 
R. Jahrb., 1905, vol. ii., p. 75. 
R. Jahrb., 1893, vol. ii., p. 339. 
Q. Joum., 1884, p. 214. 
Q. Joum., 1884, p. 432. 
H. S. Washington, J.G., iii., p. 150, 1895. 
W. Cross, 16 A.R.U.S.G.S., iL, p. 45, 1895. 
R. Jahrb., 1903, vol. i., p. 432. 
R. Jahrb., 1899, vol. i., p. 82. 
Hornbl. granite. 
Pyroxene andesite. 
Pyroxene andesite (mean 
of three analyses). 
Granitite. 
Quartz diorite (tonalite). 
Andesite. 
Augite andesite. 
Quartz basalt. 
Andesite dyke (altered). 
Pyroxene andesite. 
Hornbl. andesite segrega- 
Diorite. 
Pinto diorite. 
Hypersthene andesite. 
Pyrenees. 
Tokay. 
Kaba, Sumatra. 
S. Arcot, 
Gilgen. 
Bergen, Western Norway. 
Marian Island. 
California, 
Cockfield. 
Tokio. 
Greece. 
Colorado. 
Montana. 
