116 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . P,0 5 . 
h 2 o. 
Al.Oj. 
Fe.O 
3 . FeO. 
MgO. 
GaO. 
Na 2 0. 
k 2 o. 
Total. 
Sp.Gr, 
27 
61-0 
•5 
3-1 
18 . 5 
2-1 
•8 
•9 
1-9 
7*3 
4*8 ' 
101*3 
2*56 
•2 
16-5 
7-9 
1*4 
5-8 
5*0 
2*3 
99*7 
2*75? 
59-7 
•1 
2-5 
17-0 
32 
1-3 
•8 
23 
8*4 
4*2 
99*6 
59-2 
•9 
18-8 
4-3 
1-7 
1*9 
6-6 
4*7 
2*0 
100T 
59-2 
!-3 
13-6 
5-6 
4-0 
1-7 
5-1 
5*3 
4*6 
100*4 
2*74 
58-8 
•8 -3 
1-2 
17-5 
2*4 
2-5 
1-0 
2-6 
6*8 
5*9 
100*0 
583 
2-5 
19-4 
1-4 
31 
1-3 
5*1 
3*8 
100*5 
58-3 
•2 -1 
2-4 
16-6 
4-1 
3*5 
•4 
1*7 
7*3 
5*5 
100*0 
57-4 
2-0 -6 
1*0 
19-4 
1-7 
2-9 
1-2 
2-7 
6*5 
4*3 
99*7 
12 rooks 
59 9 
•4 *1 
1-5 
17-2 
2-6 
33 
1-1 3-6 
6*1 
4*4 
100*2 
2*70 
±1-2 
±1-4 
tl-8 
* 
1*7 
1*7 
±7*8 
28 
a b b 
abb 
60-7 
18-9 
4-4 
2-9 
2*7 
4*1 
5*4 
99*1 
59-8 
1-3 
16'8 
2-6 
4*4 
2*4 
6*5 
100*8 
2*73 
593 
•2 -3 
•8 
18-6 
■3 
•7 
2*6 
4*5 
6*9 
98*7 
58-9 
•4 
1*9 
17 -7 
3 9 
2-9 
•5 
1*1 
7*4 
5*6 
100*3 
58-5 
•3 -2 
1*4 
166 
6*2 
5*4 
100*3 
58-2 
•3 -6 
•9 
18-3 
4-6 
•3 
2*5 
4*5 
6*9 
97*7 
58-0 
■6 
169 
3-3 
4-5 
2-0 
3*6 
5*1 
5*2 
100T 
57-9 
•7 
■9 
15-8 
6-8 
•2 
1-7 
3*0 
6*0 
7*3 
100*2 
2*52 
57-3 
*7 -5 
2-2 
18-5 
4-4 
1-2 
2-1 
3*6 
4*4 
5*4 
100*3 
53-8 
1*3 
15-2 
71 
4-2 
1*1 
1*7 
10*5 
5*1 
100*0 
537 
2-0 
•3 
16-8 
6-6 
2-6 
1-7 
2*5 
9*1 
99*4 
535 
•9 
1-8 
16-4 
87 
1-9 
11 
1*5 
10*0 
4*6 
100*3 
52-6 
•8 -6 
3-6 
16-9 
4-5 
3-2 
37 
5*1 
3*9 
5*2 
100*1 
520 
1*0 
(5-4) 
181 
2-2 
5-4 
2-8 
4*6 
3*8 
. 4*7 
100*0 
14 rocks 
56-7 
■6 *2 
1*6 
17*2 
4-8 
2 6 
1-7 3-0 
5*8 
5*6 
100*2 
2*63 
±i-7 
±•9 
i= i'6 
* 
1*7 
* 
1*8 
±7*7 
29 
a b b b a a 
61-0 
| *4 -1 
1-4 
190 
1-8 
1-4 
4*1 
6*7 
3*5 
100*3 
60-4 
•5 
17-4 
2-0 
m 
1-9 
2*8 
7*5 
5*6 
60-1 
34 
20-5 
1-0 
•7 
1-2 
2*6 
9*6 
1*1 
100*2 
596 
•8 
18-7 
51 
■8 
1*8 
7*0 
5*6 
99*4 
59-0 
•8 
•7 
18-2 
1-6 
3-7 
1-1 
2*5 
7*0 
5*3 
100*0 
58-8 
1 
18-6 
50 
1*8 
1-0 
3*8 
7*9 
3*1 
100*0 
58-7 
•1 
2-6 
19-3 
•8 
1*4 
8*6 
4*5 
100*0 1 
58*6 
•2 
2-9 
19-6 
2-2 
•6 
1*2 
5*3 
2*52 
58-5 
20-3 
2'4 
•6 
*9 
9*5 
. 5*2 
100*0 
2*55? 
57-7 
•7 
3-1 
20-4 
2-3 
1*5 
•7 
3*2 
7*5 
4*7 
101*8 
2*62 
57-7 
3-2 
20*6 
"?5 
■5 
1*5 
7*0 
6*0 
100*0 
2*58 
56-9 
2-5 
210 
3 4 
•3 
9*1 
56 3 
i-o -7 
' 7 
19-8 
1-9 
2 0 
1-2 
26 
8*9 
5*3 
100*4 
Classification of Igneous Rocks. 
117 
1907-8.]. 
—continued. 
F. Rinne, Jb. Pr. G.L.A., vii., p. 21, 1887. 
iV. Jahrb ., 1869, p. 708. 
iV. Jahrb., 1893, voL ii., p. 497. 
iY. Jahrb., 1906, vol. i., 222. 
Whitman Cross, Table XIII. 
iY. Jahrb., 1902, vol. ii., p. 399. 
W. Tarassenko, cf. N.J., 1899, i., p. 463. 
iY. Jahrb., 1904, vol. ii., p. 57. 
N. Jahrb., 1904, vol. ii., p. 410. 
Soda trachyte. 
Andesite. 
Syenitic trachyte. 
Amph. pyr. andesite (mean 
of three analyses) 
Andesite. 
Umtekite. 
Labradorite rock. 
Phonolite. 
Pulaslcite. 
Rhongebirge. 
Auvergne. 
Montana. 
Sago, Sumatra. 
Siebengebirge. 
Cabo Frio, Brazil. 
Wolhynia. 
Br. E. Africa. 
Mt. Royal. 
N. Jahrb., 1903, vol. i., p. 74. 
Hatch, Petrology, p. 147. 
N. Jahrb., 1892, vol. ii., p. 2S5. 
N. Jahrb., 1904, vol. ii., p. 57. 
N. Jahrb., 1902, vol. ii., p. 399. 
•V. Jahrb., 1892, vol. ii., p. 255. 
AT. 0. Brogger, Eg. Kg., ii., p. 33, 1895. 
H. J. Johnston-Lavis, Geol. Mag., Dec., iii., vi., 
p. 77, 1889. 
J. P. Iddings, J.G., iii., p. 947, 1895. 
N. Jahrb., 1902, vol. ii., p. 382. 
N. Jahrb., 1902, vol. ii., p. 382. 
iV. Jam., 1902, vol. ii., p. 382. 
J. P. Iddings, /.ft, iii., p. 947, 1895. 
iY. Jahrb., 1902, vol. ii., p. 67. 
Trachyte (mean of 13). 
Syenite. 
Trachyte. 
Solosbergite. 
Nordnarkite. 
Trachyte. 
Akerite. 
Trachyte. 
Quartz banakite. 
Lamprophylite, lujavrite. 
Lujavrite. 
Lujavrite. 
Banakite. 
Bostonite. 
French Alps. 
Plauenscher Grand. 
Naples. 
Br. E. Africa. 
Cabo Frfo, Brazil. 
Naples. 
Norway. 
Naples. 
Yellowstone Park. 
Lujaor, Urt Kola. 
Lujaor, Urt Kola. 
Yellowstone Park. 
Orkney Islands. 
W. Cross, 14, A.E.U.S.G.S., ii., p. 227, 1894. 
K. Jahrb., 1900, vol. ii., p. 236. 
E. 0. Hovey, A.J.B., iii., p. 291, .1897. 
jV. Jahrb., 1893, vol. ii, p. 347. 
w. S. Bayley, B.G.S.A., iii., p. 250, 1892. 
iY Jahrb., 1900, vol. i., p. 385. 
iV. Jahrb., 1893, vol. ii., p. 497. 
W. Cross, 16, A.R. U.S.CT.S., ii., p. 39, 1895. 
Bull. U.s. Geol. Sure., No. 148, p. 114. 
E. Holler, N.J., 1888, i., p. 97. 
A. Geikie, p. 166, third edit. 
A D. Irving, Amm. Y. Ac., xii., p. 272, 1899. 
Whitman Cross, p. 201. 
Augite porphyry. 
Trachyte andesite. 
Keratophyre. 
Resembles elaeol. syenite 
Nepheline syenite. 
Soda syenite. 
Acmite trachyte. 
Phonolite. 
Phonolite. 
Phonolite. 
Phonolite (average). 
Phonolite. 
Laurdalite. 
Utah. 
Sumatra. 
Connecticut. 
Arkansas. 
New Hampshire. 
Laupstadeid. 
Montana. 
Colorado. 
Dakota. 
Rhongebirge. 
Dakota 
Norway. 
