142 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. 
54 
40-1 
3-0 
1-3 
•9 
15-5 
6-3 
7*3 
8-4 
12*4 
3-4 
1*7 
100-2 
39-8 
•8 
1-4 
1-8 
18-2 
6-9 
4-4 
8'4 
13-8 
3*4 
•8 
99-7 
13 rocks 
44-6 
1-0 
•4 
1*4 
16-3 
5*7 
6-8 
9-1 
11*6 
2-5 
•9 
100-4 
3-00 
±1*6 
±1-4 
±1-1 
±1-9 
+ 
•9 
±6-9 
55 
b b a 
b b a 
48-8 
1-2 
15-2 
5-7 
10*4 
4-6 
10-4 
2T 
•9 
99-2 
3-01 
48-3 
•4 
15-7 
16-6 
3*7 
8-4 
3-6 
1-6 
98 3 
47*0 
•5 
18-1 
4-0 
8-7 
5-4 
10-3 
41 
1*4 
99-6 
... 
46*6 
•6 
1*4 
153 
8-4 
8-5 
5-3 
9-3 
3-0 
1-4 
99-8 
... 
46-3 
3*1 
16-9 
14-7 
6*0 
3-7 
7-9 
•9 
99-4 
... 
46-3 
•6 
3*0 
13*4 
4-4 
12*8 
4*4 
11-9 
2*1 
1-9 
100-9 
(2-40) 
46-2 
•2 
1-0 
18*3 
6*5 
71 
7*0 
10-0 
3-1 
•8 
: ioo-3 
45-5 
•5 
15-8 
15*3 
4-0 
9-3 
5-0 
3-0 
100-0 
2*8*4 
45-4 
4-9 
16-8 
15-7 
3-1 
10*2 
2-8 
1*4 
! 100-2 
44-4 
1-6 
•3 
1-7 
13-3 
9-1 
6'3 
5-7 
10-6 
5*6 
1*8 
100-3 
3-01 
441 
2-3 
•3 
17-6 
3*4 
10-0 
7-2 
11-6 
2-9 
•9 
100-2 
' 3-54 
43-9 
4-1 
•7 
1*6 
16-2 
4-0 
10-1 
5-1 
9-6 
2*9 
1-5 
99-7 
43-5 
2-1 
1-2 
18*1 
7-5 
7-6 
3-5 
13*4 
2*0 
1*3 
100-2 
43*5 
1-8 
•9 
•9 
22-0 
35 
7-8 
3*4 
14-1 
3’0 
•9 
101-7 
43-1 
•5 
1*5 
•7 
15'2 
5-3 
8-6 
y 
7*5 
11*9 
4-0 
2-5 
100-8 
3*21 
43*0 
1*3 
14-0 
15-3 
9-1 
12-1 
39 
1*3 
100-0 
42-9 
3-1 
21*1 
37 
8-3 
5-2 
11-6 
4*2 
•7 
100-6 
42-4 
1*1 
21-0 
4-7 
8-6 
3*2 
15-9 
2-8 
1-2 
100-9 
39-0 
3*0 
1*3 
1-9 
11-8 
9-0 
9-5 
'7*4 
11 ’3 
3*9 
1*6 
99-7 
19 rocks 
44-7 
•9 
•3 
1-5 
16-6 
7-0 
7-8 
5 3 
10-8 
3-6 
1-4 
100 1 
3T2 
, s 
j 
. 
, 
. 
. 
±1*6 
±2-1 
±1*5 
±2-1 
±1*2 
±8-5 
(2-40) 
56 
b b a 
b b b 
1 
1 
47-7 
17-6 
4-2 
12*7 
6-0 
io-o 
1*4 
•2 
99-5 
46-8 
•2 
•9 
17*6 
16-8 
51 
9-5 
2-6 
•5 
100-0 
46-8 
'3 
18-0 
6-2 
8-8 
8-4 
10-2 
2-2 
•1 
101-0 
3 : i*0 
461 
1-6 
17*9 - 
•8 
13-7 
y 
6-9 
8-0 
4-7 
'7 
100-2 
45-7 
2-0 
17*1 
20-7 
2*3 
9*6 
2-6 
100-0 
2-97? 
44-0 
1-9 
16-9 
8-6 
8-7 
5*9 
9-9 
4*0 
1*0 
100-9 
42-3 
•6 
3-6 
12-6 
15*5 
5-2 
5-2 
8*4 
5-2 
2-7 
101-3 
2*9*7 
42-0 
4-8 
17-6 
6-2 
8*6 
8-0 
8-5 
2*1 
2-8 
100-6 
3-01 
41-1 
•2 
•8 
21*0 
4-8 
9*2 
8-0 
14-7 
•6 
'6 
101-0 
39-8 
•1 
•9 
19-7 
7-7 
8*9 
73 
13-5 
1*6 
•5 
100-1 
3 : i*8 
39-6 
1-3 
17-0 
6-6 
9*3 
6-7 
10-6 
6-0 
3*1 
100-1 
390 
•5 
21-6 
9-0 
6-8 
4-5 
12-6 
3*8 
2*6 
100-4 
