132 
Proceedings of the Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group. 
Si0 2 . 
Ti0 2 . P2^5* 
H 2 0. 
A1 2 0 3 . 
Fe 2 0 3 . FeO. 
MgO. 
CaO. 
Na 2 0. 
K 2 0. 
Total. 
Sp. Gr. 
43 
48*8 
1-3 
•2 
4*1 
16-6 
5-6 
5*0 
6*9 
8-9 
2‘5 
*7 
100*4 
(2-78) 
48*5 
2*2 
•2 
1*2 
18-4 
7-6 
1*2 
6*7 
10*4 
3*0 
*6 
100*0 
... 
48-4 
3*1 
2*2 
13-4 
4-0 
8*5 
6*5 
8*6 
3*1 
2*1 
99-9 
47-7 
2-6 
•2 
2-9 
14*8 
5-0 
6*4 
5*5 
9*3 
3*5 
1*6 
100-1 
2*99 
47*4 
3-1 
•4 
23? 
16-7 
4-6 
6*7 
4*1 
10*8 
3*0 
*9 
100-0 
43-7 
2*8 
•6 
4-5 
14-8 
2-4 
7*5 
7*0 
10*8 
3*1 
2*9 
100-1 
2*91 
19 rocks 
500 
1-4 
•2 
23 
15*5 
5-2 
5*6 
5*6 
9*2 
s 
3*1 
2*1 
100-1 
2-95 
±i-o 
±1-2 
±1-1 
±1*5 
±11 
±5-9 
(2-71) 
b a b 
abb 
44 
51-2 1 
•4 
•1 
•1 
15-9 
9-3 
3*0 
6*5 
10*4 
1*2 
1*6 
99-7 
3-19 
51-0 
1*8 
•7 
1-0 
14*5 
4-2 
4*4 
8*2 
5*1 
1*8 
7*2 
99-9 
50*2 
1-9 
•2 
16-2 
31 
8*1 
7*5 
8*6 
3*4 
1*4 
100-6 
(2-79) 
50-0 
1-4 
16-5 
12*3 
5*5 
9*5 
2*3 
1*5 
99-0 
49-6 
33 
15-4 
12*3 
7*4 
9*6 
2*0 
*9 
100-4 
49-0 
1-6 
1*4 
16*1 
1-9 
9*6 
7*6 
8*7 
3*0 
1*2 
100-2 
2*8*9 
49*0 
22 
•1 
2-0 
14-4 
4*3 
6*6 
8*4 
8*4 
3*4 
2*3 
101-9 
2-94 
48-8 
3-6 
181 
3-5 
7*2 
4*9 
8*4 
3*7 
1*9 
100*1 
2-79 
48*8 
•9 
1-0 
18-7 
7-2 
3*4 
6*0 
9*5 
3*2 
1*1 
99-9 
2-91 
48-3 
1*6 
1-9 
16*7 
4-0 
6*3 
5*8 
8*3 
3*2 
4*1 
100-2 
2*90 ? 
1 
47-9 
1-9 
•3 
*2 
16-6 
5-7 
8*1 
4*4 
9*4 
3*2 
2*1 
99-8 
47-7 
1-8 
1*4 
19-0 
•9 
8*8 
8*7 
9*0 
2*5 
*5 
100-3 
2*8*9 
47*6 
1*4 
32 
17*2 
3*6 
8*5 
6*3 
6*4 
4*7 
1*3 
100-2 
2-89 
46*8 
1-8 
17-9 
5 3 
5*6 
7*3 
8*2 
3*5 
2*2 
98-6 
46-0 
3*1 
192 
5-9 
6*9 
6-8 
8*7 
3*3 
1*2 
101-1 
2-80 ? 
45-9 
4*2 
18-2 
1-2 
9*5 
10*1 
7*2 
2*1 
1*8 
100-1 
2-96 
45-8 
1*7 
•6 
3*2 
159 
7-4 
6*1 
6*9 
7*2 
3*4 
1*3 
99-6 
17 rocks 
48-4 
1-0 
•1 
1-9 
16-9 
4-0 
7*5 
7*0 
8*4 
2*9 
2*0 
100-1 
2-93 
j 
v 
1+ 
i-j 
±1-2 
±1*1 
±1*3 
±1*2 
±5-9 
(2*79) 
b a b b a a 
45 
55*7 
20-4 
6-4 
3*8 
8*3 
5'7 
1*9 
102-4 
52-8 
•5 
1-2 
17*8 
1*2 
4*8 
4*8 
12*9 
3*0 
*5 
99-5 
2-91 
513 
•1 
1-1 
17*5 
4*5 
4*9 
3*8 
131 
2*2 
2*4 
100-9 
• . • 
49-8 
•8 
•1 
2-0 
20-0 
6*3 
*5 
7*0 
11*3 
2*2 
*6 
100-6 
49-7 
•8 
2-4 
14-4 
4-2 
3*8 
6*3 
10*1 
3*2 
5*5 
100-2 
49-6 
•3 
3-6 
19*2 
2-1 
5*0 
4*9 
10*0 
5*6 
1*0 
101-4 
2*7*8 
49*0 
•6 
5*3 
17-7 
21 
6*5 
21 
8*4 
6*8 
2*1 
100-6 
48-6 
•1 
3-1 
20-2 
1*3 
3*0 
7*6 
14*0 
2*2 
•2 
100*3 
47-8 
2-3 
1-3 
•3 
16-1 
4‘3 
3*6 
5*5 
10*7 
4*5 
4*1 
100-5 
2*86 
47*8 
•3 
*5 
•6 
20*5 
2*5 
6*4 
4*6 
10*7 
4*7 
*5 
100-1 
47-6 
1-4 
2-7 
2-2 
14-5 
4*9 
4*4 
2*6 
9*5 
6*7 
4*1 
100*7 
2-79 
473 
•9 
•7 
1-4 
20-8 
1*9 
4*5 
6*4 
13*0 
2*8 
*2 
99-9 
46-6 
3*0 
*9 
18*2 
6*0 
13*4 
4*4 
1*4 
100-7 
