144 Proceedings of the Royal Society of Edinburgh. [Sess. 
List or 1000 Rocks 
Group. 
SiO,. 
Ti0 2 . P 2 0 6 . 
H 2 0. 
A1,0 3 . 
Fe 2 0 3 . 
FeO. 
MgO. 
CaO. 
NajjO. 
k 2 o. 
Total. 
SpGr. 
56 
38-6 
1-3 
20-4 
7-6 
59 
12-9 
9-4 
2-3 
1-4 
99-8 
381 
5-5 
17-9 
14-1 
8-9 
11‘7 
10 . 
2-0 
99 3 
36 4 
21 1-1 
■8 
16-1 
12-9 
6-9 
50 
15*5 
2-4 
11 
100-3 
15 rocks 
42-2 
•2 -1 
1-8 
17-9 
83 
8-1 
6-7 
10-8 
2-8 
1-3 
100-3 
3-08 
±30 
±1-4 
± 
20 
± 
2-6 
±1-9 
±10-9 
57 
b b b 
aaa 
51-9 
3'0 
2-5 
3'5 
9*4 
26-0 
36 
100-1 
50-8 
3-4 
1*7 
8'3 
22-8 
123 
1000 
3*32 
49-4 
2-6 
34 
1-3 
59 
350 
2*1 
45-0 
1-0 *1 
38 
63 
34 
8-3 
21-0 
8-8 
•9 
99-2 
42-8 
33 
33 
4-8 
301 
65 
•5 
98-9 
2-95 ? 
41-5 
•2 *2 
17 
3*6 
63 
8-9 
25-3 
66 
•3 
•1 
975 
38-6 
6'4 
3-7 
7-6 
7-8 
27-7 
7.7 
■2 
99-7 
7 rocks 
45-7 
•2 
35 
4-3 
39 
7 6 
26-8 6-8 
•2 
•2 
99-3 
3-25 
±30 
±1*4 
' ± 
2-6 
± 
2-6 
± 
•4 
±10-0 
58 
b b b 
a ab 
45*7 
1-2 
6-6 
9 
34-8 
2-1 
99-5 
3-10? 
43-8 
1-3 
1-1 
92 
•6 
44-3 
1*7 
101-4 
329 
43-2 
•8 
2-4 
4-5 
4-6 
38-8 
2-7 
23 
•6 
99-9 
42-8 
■6 
■0 
9*4 
47-3 
100-1 
3’30 
42 0 
1-7 
4.4 
2-8 
41-1 
3-3 
1-2 
•3 
101-2 
41-5 
•3 
6-9 
2-2 
35*9 
5-8 
1-4 
•3 
101-0 
41-4 
4.4 
•8 
2-5 
6-4 
437 
•6 
40-0 
2-1 
3‘6 
41-3 
4-2 
99-6 
3-25 
399 
•2 
(-3) 
3*8 
15-3 
40-5 
1-0 
101-0 
392 
•4 
(■4) 
•4 
16-4 
43-8 
1-2 
101-8 
10 rocks 
42-0 
1-3 
2-6 
3*0 
7.7 
41-2 
2-3 
•5 -i 
100-5 
3-20 
±Fi 
±2-2 
± 
?9 
±2-4 
± 
■8 
±10-1 
59 
b b b 
aba 
46-8 
•7 
9'8 
163 
18'1 
9-6 
101-3 
3-33 
464 
3-9 
10-8 
5-9 
5-6 
22-2 
3-7 
■3 
1*2 
100-2 
43-7 
2-8 
11-2 
6-1 
25-6 
7*1 
■5 
•3 
101-2 
429 
109 
3 5 
16-3 
9-1 
•9 
100-0 
2-88 
41-4 
5-6 
66 
139 
63 
18-4 
7*2 
•2 
•9 
100-6 
2-82 
40-8 
4-1 
10-4 
35 
6-4 
23-3 
8-5 
1-7 
99-1 
2-96 
40-4 
50 
99 
4-8 
8-3 
21-6 
4.7 
36 
•8 
99-1 
3T1 
401 
•4 -2 
4-0 
7-8 
7-4 
8-7 
6-5 
1-2 
•5 
100-6 
2-99 
39 9 
2-7 -5 
8-7 
4-4 
108 
1-9 
100-3 
3-20 
396 
1*0 
57 
7*3 
4.4 
10-5 
248 
4-8 
10 
•3 
2-89 
1907-8.] Classification of Igneous Rocks. 145 
— continued. 
N. Jahrb., 1903, vol. i., p 417. 
jV. Jahrb., 1893, vol. ii., p. 347. 
N. Jahrb., 1902, ii., p. 29. 
Ariegite. 
Ouacliite. 
Nepheline basalt. 
Lberz, Pyrenees. 
Pot. sulphur springs, 
Arkansas. 
Werrberg, near Homberg. 
G. H. Williams, B.U.S.G.S., 148, p. 83, 1897. 
G. H. Williams, A.G., vi., p. 41, 1890. 
iV. Jahrb., 1900, ii., p. 397. 
N. Jahrb., 1900, vol. i., p. 75. 
Tschermak, Porphyrgesteine Oest., 1869, p. 287. 
Q. Joan., 1883, p. 257. 
Hatch, Petrology, p. 211. 
Pyroxenite. 
Pyroxenite. 
Peridotite. 
Anorth. oliv. gabbro. 
Picrite. 
Oliv. diall. rock. 
Maryland. 
Maryland. 
Bologna, Apennines. 
Michigan. 
HdleT*™ 1113 ' 
Westphalia. 
Cossa, Richerche chim e. micro. 
Of J. J. H. Teall, Brit. Petr., London, 1888, 
p. 103. 
iV. Jahrb., 1904, vol. i., p. 208. 
Hatch, Petrology, p. 211. 
N. Jahrb., 1895, vol. ii., p. 267. 
iV. Jahrb., 1895, vol. ii.,p. 267. 
Hiller and Clarke, B.U.S.G.S., 60, p. 23, 1890. 
H. H. F. Ulrich, Q.J.G.S. , xlvi., p. 629, 1890. 
jv. Jahrb., 1902, vol. ii., p. 387. 
N. Jahrb., 1902, vol. ii., p. 387. 
Pyrox. peridotite (lher- 
zolite). 
Saxonite. 
Olivine segregation. 
LherzoHte. 
Hornbl. lberzolite. 
Saxonite. 
Peridotite. 
Dunite. 
Dunite. 
Baldissero. 
St Paul’s Rocks. 
Rhenish Prussia. 
New Zealand. 
Prades. 
Causson. 
Oregon. 
New Zealand. 
Ural. 
Ural. 
Bal Sure. India (T. H. Holland). 
"■ Jalurb., 1901, vol. ii., p. 233. 
N. Jahrb., 1901, vol. ii., p. 233. 
Hatch, Petrology, p. 205. 
W Joum., 1883, p. 257. 
Hatch Petrology, p. 205. 
u i ahrb -’ 1903-4, suppl., p. 292. 
KcBus z,N.J., 1895, i.Jp 74. 
Wutman Cross, Table ill. 
"• Janr K 1903-4, Buppl., p. 292. 
Pyroxenite. 
Mica hornblendite. 
Bronzite bornbl. peridotite. 
Picrite. 
Picrite. 
Picrite. 
Palaeopicrite. 
Nepliel. basalt. 
Picrite. 
Pallaverasse. 
Pyrenees. 
Pyrenees. 
Anglesey. 
Schriessneim. 
Giimbelberg. 
Burg. 
Devonshire. 
Black Mts., Texas. 
Madenbach. 
VOL. XXVIII. 
