94 
Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . P 2 0 6 . 
HjO. 
A1 2 0 3 . 
Fe 2 O s . 
FeO. 
MgO. 
CaO. 
Na 2 0. 
k 2 o. 
Total. 
Sp.Gr. 
3 
760 
•2 
•9 
12-3 
•9 
•9 
•2 
•2 
4 0 
4-4 
100-0 
75'9 
•5 -3 
12-3 
1*1 
1-4 
•3 
•9 
3-2 
34 
1001 
75-2 
■7 
13-8 
•6 
1-4 
*1 
•7 
3-8 
33 
99-8 
74-6 
■2 
10 0 
3-8 
1-7 
•3 
2-4 
3-3 
3*4 
99 *9 
74-1 
4'4 
12-4 
•3 
•2 
*4 
•3 
32 
5-1 
1003 
73-7 
•4 
11-2 
1-3 
32 
•6 
2*8 
1-9 
99-2 
734 
1-3 
12-1 
■9 
3-4 
11 
2-9 
3’9 
17 
100-7 
2-74 
72-6 
6-2 
12-4 
•7 
1*1 
•9 
1-7 
99-3 
(2-34) 
72-3 
4-9 
11-6 
1-4 
1-1 
•5 
1*3 
4-1 
40 
101-3 
(2-36) 
21 rocks 
75-8 
■i 
1*3 
11-8 
i'3 
1-2 
•3 
•9 
4-2 
30 
100-1 
(2-36) 
±1 : 0 
±•6 
’■7 
* 
•8 
±4-0 
4 
a a a 
a b b 
76-4 
1*5 
14-2 
1-6 
•6 | 
1-8 
4-2 
100-3 
2-50? 
76-4 
•1 
1*0 
11-7 
■6 
•3 
1-6 
7*0 
2-60 
76-3 
2-5 
12-6 
31 
•5 
•4 
1*3 
3-5 
100-2 
75-9 
1-0 
12-1 
2*8 
*8 
•1 
•1 
4-0 
4-3 
101-0 
75-7 
1-2 
12-6 
1-7 
•7 
1*6 
1-8 
4-5 
99-8 
75-5 
1-1 
146 
10 
•3 
1*3 
10 
3*5 
99-7 
75*4 
15-5 
1-2 
1*4 
38 
97-3 
75-3 
11-4 
5-4 
•6 
•8 
1-4 
6-1 
101-0 
2-67 
74-8 
:3 
13-5 
5-0 
•7 
•9 
1*5 
33 
100-0 
2-67 
74-8 
•6 
11-6 
3-5 
•2 
•2 
4*3 
49 
100-2 
74-7 
•9 
11-9 
2*8 
■3 
2-9 
53 
99"5 
2-65? 
73-0 
33 
12-6 | 
2-5 
•3 
•7 
1*7 
5-9 
1000 
73-0 
•1 
2*0 
13-7 
2-0 
1-1 
20 
1-5 
3-9 
1-5 
100-8 
72-8 
•2 
2-8 
12-2 
•4 
3-1 
•2 
•1 
3-4 
4-7 
1001 
72-6 
3-0 
16-2 
2-7 
•5 
1*4 
•2 
3-4 
100-1 
72-1 
1-7 
14-0 
2-1 
2-4 
1-0 
2’4 
1-1 
33 
100-0 
2 "55 
71-4 
1-4 
11-8 
5-6 
1-4 
■6* 
■2 
4‘2 
43 
100-9 
70-6 
6-0 
15*0 
2-6 
•6 
1-2 
2-4 
1-6 
100-0 
(2-34) 
18 rocks 
74-3 
1*7 
13-2 
2'1 1-1 
•6 
•7 
2-1 
4-2 
100 
2-62 
±ri 
±1-3 
±1*] 
*■ 
■8 
±1-7 
(±6-0) 
(2-34) 
5 
a a a 
baa 
773 
•6 
14-6 
•4 
7-6 
•2 
100-3 
77*1 
•1 
■4 
133 
■8 
•2 
1*3 
4-4 
32 
100-8 
2*66 
76 6 
135 
1 
35 
5-5 
100-4 
76-4 
•2 
15-5 
•4 
2*1 
30 
2-3 
99-9 
76 0 
•5 
12-5 
1-5 
•3 
•1 
•2 
3-9 
4-7 
99-6 
■6 
11-8 
20 
•3 
3-4 
5-6 
100-1 
75-8 
12-4 
•2 
1*3 
•3 
•8 
4-0 
46 
99-8 
76-4 
•6 
11-8 
1-8 
10 
■3 
37 
5-4 
100-0 
2*62 
76-4 
• *1 
11 
13-6 
•2 
1 
4-6 
4-4 
100-7 
Classification of Igneous Rocks. 
95 
1907-8.] 
— continued. 
N. Jahrb., 1903, voL i., p. 430. 
Q. Joum., 1899, p. 467. 
J. P. Iddings, M.U.S.G.S . , xxxii., p. 426, 
N. Jahrb ., 1901, vol. ii., p. 244. 
G. W. Card, Rec. G.S.N.S.W., iv., p. 116, 1895. 
N. Jahrb., 1901, vol. ii., p. 244. 
Q. Joum., 1883, p. 297. 
Hatch, Petrology , p. 1 29. 
Q. Joum., 1893, p. 545. 
Rhyolite. 
Rhyolite. 
Rhyolite. 
Granite rock. 
Trachyte. 
Rhyolite gneiss. 
Felsitic tuff. 
Pitch stone. 
Pitch-stone porphyry. 
Aroostock area. 
Mt. Sheridan, California. 
Yellowstone Park. 
Fox River. 
N. S. Wales. 
Fox River. 
St Davids. 
Arran. 
Arran. 
Teall’s Br. Petrology , 1888, p. 348. 
N. Jahrb., 1893, vol. ii., p. 100. 
N. Jahrb., 1905, vol. ii., p. 57. 
N. Jahrb., 1905, vol. i.. p. 247. 
Q. Joum., 1899, p. 765. 
N. Jahrb., 1901, vol. ii., p. 62. 
Prestwick, vol. i., p. 41 (Durocher). 
T. H. Holland, Mem. G.S.I., xxviii., p. 142, 
1900. 
(T. H. Holland). 
Whitman Cross, Table XIII. 
Roth’s Bextrage z. Petrog., 1869, p. 51. 
Prestwick, i., p. 37. 
N. Jahrb., 1904, vol. ii., p. 223. 
aV. Jahrb., 1903, vol. i., p. 430. 
Q. Joum., 1883, p. 297. 
L. Ricciardi, Atti. Ac. Gioen. Catan., xviii. (18), 
N. Jahrb., 1905, vol. i., p. 247. 
A. Geikie, p. 140. 
Rhyolite. 
Quartz porphyry. 
Quartz porphyry. 
Liparite, mean of 1 and 2. 
Felsite, nodular. 
Leptite. 
Felsite. 
Charnockite. 
Ckarnockite. 
Comendite. 
Eurite. 
Rhyolite. 
Quartz-diorite porphyrite. 
Trachyte (resembl. bos- 
tonite). 
Felsitic tuff. 
Porphyry. 
Liparite. 
Pitch stone, average. 
Tardree, Antrim. 
Alvensleben. 
Bohemia. 
Somali. 
Co. Waterford. 
Suoniemi, Finland. 
Brittany. 
Mt. Thomas. 
Madras. 
Sardinia. 
Moena, Tyrol. 
Hungary. 
Montenegro. 
Aroostock. 
St Davida 
Piedmont. 
Somali Desert 
Hatch, Petrology, p. 138. 
N. Jahrb., 1906, vol i. 
N. Jahrb., 1900, vol. i., p. 224. 
Q. Joum., 1895, p. 319. 
J. E. Spurr, A.G., xxv., p. 231, 1900. 
H. O. Lang, Nyt. Mag., xxx., p. 40, 1886. 
W. Lindgren, B.U.S.G.S. , 150, p. 151, 1898. 
N. Jahrb., 1904, vol. ii., p. 407. 
N. Jahrb., 1905, vol. ii., p. 234. 
Soda rhyolite. 
Alkali granite. 
Granitite. 
Alaskite. 
Quartz porphyry. 
Rhyolite obsidian. 
Quartz porphyry. 
Liparite. 
Wicklow. 
Campa, Elba. 
Kullen. 
Challenger Expedition. 
Thiiringerwald. 
California. 
N. Hampshire. 
John Day Basin. 
