118 Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . 
p 2 o 5 
h 2 o. 
A1 2 0 3 . 
Fe 2 0 3 . 
. FeO. 
MgO. 
CaO. 
Na 2 0. 
K 2 0. 
Total. 
Sp. Gr. 
29 
55-9 
•2 
3-7 
20-4 
2-2 
1-6 
•6 
2-2 
8-4 
4-8 
100-0 
2-45 
53 4 
13 
■1 
4-4 
18-2 
2-2 
34 
1-0 
37 
8-4 
39 
100-0 
2-49 
15 rocks 
58-2 
•2 *1 
2-2 
19-5 
22 
1-8 
•8 
2-4^ 
8-1 
46 
100-1 
2-53 
±i-i 
±•9 
| 
•9 
±1 
•1 
± 
1-0 
±5-6 
30 
ab b b ab 
600 
•1 
•6 
20-8 
4-0 
•8 
•8 
2-6 
6-0 
5-5 
101-1 
2-66 
59o 
•6 
18-9 
5-3 
1-5 
1-9 
5-1 
7'2 
1000 
2-60 
1-4 
20-0 
4-7 
1-1 
2-4 
55 
5-8 
100-0 
2-52 
592 
1-1 
186 
6-1 
1-1 
3-0 
49 
6-7 
100-6 
2-55 
57'5 
•6 
12 
15-4 
4-9 
•9 
1-4 
3‘4 
5‘5 
9-4 
100-4 
572 
•5 
25 
19-7 
2-2 
3-7 
■4 
2-2 
43 
7-1 
99-4 
56-8 
1-2 
•2 
18-4 
2-2 
3 0 
2-0 
4-7 
4-9 
59 
99-4 
56-3 
•7 
•5 
04) 
20-4 
2-8 
3-5 
1-5 
3 8 
6-0 
4-1 
100-0 | 
•8 
20-5 
1-8 
4*2 
2-5 
36 
59 
4-8 
101-2 i 
54-6 
•7 
191 
2-4 
33 
2-0 
3-2 
7-7 
99-8 
53-8 
38 
19-7 
4-8 
1-9 
32 
6-0 
8-0 
101-2 
2-55 ? 
53-8 
•3 
•5 
4'4 
18'5 
6-2 
•7 
1-1 
2-5 
7-1 
5-5 
100-2 
13 rocks 
57-0 
■4 
•2 
1-5 
19-1 
31 
2-5 
1*4 
3-0 
5-6 
64 
100-2 
2-58 
±1 
±1-1 
± 
6 
±1-0 
1*1 
±4-9 
31 
abbbb a 
58-7 
1-8 
20-9 
4-2 
•2 
•4 
9-7 
4-2 
100-1 
58-6 
21-8 
1-8 
1-8 
9-4 
5-2 
100-3 
57-8 
1-5 
18-7 
5-8 
•4 
1-3 
9-4 
99-4 
2-64 
56-5 
2-1 
22-3 
2-7 
1-0 
1*5 
11-1 
2-8 
2-54 
56‘2 
•3 
•1 
1*0 
21-4 
2-0 
•7 
•2 
1-5 
105 
5*7 
2-62 
55-6 
32 
197 
5-5 
•9 
1-7 
8-6 
4-9 
100-1 
55-0 
■3 
•1 
2*6 
21-7 
20 
2-2 
•1 
2-1 
98 
3-5 
2-51 
54‘9 
■4 
2-6 
20-8 
1-3 
1-4 
•4 
1-0 
9-0 
73 
997 
549 
1-4 
1-1 
18-3 
V £ 
8 
1*1 
1-3 
11-4 
3-2 
100-5 
55*2 
•6 
(32) 
230 
1*2 
2-7 
100 
4*5 
100-4 
54-1 
5-4 
21-7 
3-5 
•4 
•4 
8-9 
4-8 
99-3 
54-1 
■9 
•4 
206 
3-3 
2-3 
•8 
1-9 
9-9 
5'2 
100-5 
54-0 
*6 
•3 
19-4 
4-4 
2-3 
2-0 
8-8 
53 
100-0 
54-0 
1-9 
20-3 
4-7 
•6 
•2 
2-7 
8-6 
6-8 
99-8 
53-4 
4-2 
20-2 
1-6 
3-0 
•3 
3-3 
7-9 
62 
1002 
49-1 
•6 
6-0 
19-5 
2-3 
3-9 
•6 
3-8 
93 
4-4 
99-4 
16 rocks 
55-1 
■3 
2-5 
20-6 
2-8 
1-8 
•4 
1-7 
95 
4-9 
99-9 
2-58 
±1- 
1 
±1*1 
' ±] 
L’4 
±•9 
7 
±5-2 
Classification of Igneous Rocks. 
119 
1907-8.] 
— continued. 
G. F. Fohr, In. Diss. Wurzburg , 1883, p. 28. 
N. Jahrb., 1905, vol. i., p. 275. 
Phonolite. 
Nepheline porphyry. 
Staufen, Germany. 
Bohemia, 
N. Jahrb., 1893, vol. ii., p. 347. 
Zeitsch. d. d. geol. Ges ., part iv., p. 298, 1868. 
N. Jahrb., 1893, vol. ii., p.*347. 
Zeitsch. d. d. geol. Gesell. , part iv., p. 291, 1868. 
Weed and Pirrson, Has., ii., p. 192, 1896. 
L. V. Pirsson, B.U.S.G.S., 148, p. 152, 1897. 
Hatch, Petrology. 
H. S. Washington, A.J.S., viii., p. 290, 1899. 
N. Jahrb., 1904, vol. ii., p. 400. 
N. Jahrb., 1905, vol. i., p. 437. 
Whitman Cross, Table XIV. 
Roth, Beitriige zur Petrog., 1873, p. xxxviii. 
N. Jahrb., 1904, vol. ii., p. 58. 
Pulaskite. 
Leucite trachyte. 
Elaeolile syenite. 
Trachyte. 
Tinguaite. 
Trachyte. 
Phonolite. 
Trachyte. 
Mica syenite. 
Micromonzonite. 
Laurdalite. 
Phonolite. 
Trachydolerite (kenite). 
Fourche Mts., Ark. 
Viterbo. 
Fourche Mts., Ark. 
L. Bolsena, Italy. 
Montana’. 
Traprain Law. 
Ischia. 
Tunnaes, Norway. 
Ambodimadiro. 
ML^Kenia, Afr. 
N. Jahrb., 1893, vol. ii.,' p. 347. 
iV. Jahrb., 1905, voL i., p. 437. 
iV. Jahrb., 1904, vol. ii., p. 57. 
Geol. Mag., 1871, p. 249. 
W. Cross, B.U.S.G.S., 168, p. 171, 1901. 
J. D. Irving, Ann. N.Y. Acad., xii., p. 272, 1899. 
F. G. Fohr, In Diss. Wurzburg , 1883, p. 28. 
N. Jahrb., 1902, vol. ii., p. 399. 
iV. Jahrb., 1902, vol. ii., p. 382. 
W. Bhruns, Vh. Nh. Ver. Bonn., xlviii., 
p. 317, 1891. 
J. F. Williams, A.R. Ark. G.S., 1890, ii., p. 370, 
1891.. 
AT. Jahrb., 1902, vol. ii., p. 382. 
N. Jahrb., 1904, vol ii., p. 58. 
A r . Jahrb., 1803, vol. ii., p. 347. 
N. Jahrb., 1893, vol. ii., p. 347. 
X. Salilbom, N.J., 1897, ii., p. 97. 
Nephelite syenite. 
Aegirine foyaite. 
Tinguaite. 
Phonolite. 
Phonolite. 
Phonolite. 
Phonolite. 
Nepheline aplite. 
Lujavrite. 
Nosean sanidinite. 
Tinguaite. 
Neph. syenite (chibinite); 
Trachydolerite (kenite). 
Leucite tinguaite. 
Elaeolite syenite (vein). 
Nephelinite. 
Arkansas. 
Ampangarinana. 
Abyssinia. 
Cornwall. 
New Mexico. 
S. Dakota, 
Hohentwiel. 
Cabo Frio, Brazil. 
Kola, Russia (Finland). 
Laaclier See. 
Arkansas. 
Tschasnatschorr, Fin. 
Mt. Kenia. 
Arkansas. 
Magnet Cove, Ark. 
Sweden. 
