136 
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 o . 
Total. 
Sp.Gr. 
47 
42-5 
4-9 
18-5 
3 '4 
63 
3-6 
8*7 
7*1 
4*6 
99*9 
2*78 
42-1 
1*0 
2*4 
1-8 
18-7 
1-7 
4*8 
35 
10*8 
11*0 
1*9 
99*7 
19 rocks 
46-9 
•9 
•5 
1*7 
20-0 
3-7 
4*6 
2*9 
8*4 
7*5 
3*0 
1001 
2*76 
±2-6 
±2*3 
±2-0 
±2-1 
±2*9 
±11*9 
48 
b a b b b b 
50-2 
•4 
20-1 
2-5 
5-7 
3 7 
7*8 
3*0 
7*8 
100*8 
493 
18-5 
7-0 
5-6 
3 8 
10*4 
3*4 
2*2 
100*2 
2*90? 
49-2 
•6 
19*1 
1*8 
10*3 
5*0 
8*8 
3*9 
1*2 
99*9 
49-1 
•8 
16-0 
71 
4-5 
5-0 
8*3 
4*5 
4*8 
100*2 
49-0 
•3 
19-8 
2-6 
5-3 
2-8 
8*1 
3*2 
9*1 
100*2 
48-4 
•1 
‘8 
•4 
19-9 
2-5 
5-3 
5-2 
8*0 
5*5 
4*0 
100*0 
48-2 
32 
19-2 
10-9 
5-2 
7*9 
1*7 
3*9 
100*1 
484 
20-0 
7-0 
5-0 
4-1 
10*1 
2*2 
4*5 
101*0 
47-7 
•4 
18-4 
2-5 
5-7 
4-8 
9*4 
2*8 
7*6 
99*3 
46-9 
21-3 
7 3 
4-9 
3 8 
9*7 
1*6 
5*5 
101*0 
2*79 
46-0 
•4 
•4 
171 
4-2 
5*4 
5-3 
10*7 
2*2 * 
9*0 
100*7 
45-0 
•4 
•9 
22-6 
8'9 
2-4 
10*1 
3*3 
7*1 
100*7 
2*83 
44-4 
•4 
33 
19*3 
10-8 
1-5 
4-3 
9*3 
4*0 
2*1 
99*8 
42-2 
•3 
6-2 
16-3 
3 0 
9-7 
31 
10*1 
2*1 
7*1 
100*0 
2*62 
41-0 
1-6 
24 -2 
9-5 
54 
11*0 
5*7 
1*8 
99*9 
15 rocks 
47-0 
•1 
•1 
1*2 
19-5 
5-2 
5*2 
4-2 
9*3 
3*3 
5*2 
100*2 
2*78 
y 
±1*6 
±1-6 
±1-7 
±1*0 
±2*1 
±8*0 
49 
b b a 
a a a 
54-3 
•6 
101 
7-1 
5-8 
6-5 
8*9 
4*1 
2*2 
99*6 
2*90? 
53*1 
1*8 
•1 
•7 
8-9 
3 3 
9-6 
14*4 
6*8 
*7 
*5 
99*7 
3*09 
52-1 
*7 
•8 
11-9 
1-9 
7 3 
12*5 
7*8 
2*0 
3*0 
100*0 
2*94 
51-8 
1-4 
13*4 
101 
2-9 
7-4 
10*9 
2*5 
*2 
100*7 
51-8 
1-4 
•1 
•6 
12-8 
3*6 
8*7 
7-6 
10*7 
2*1 
*4 
99*9 
303 
51-7 
1-0 
11-4 
12*6 
7-6 
]0*8 
3*5 
*7 
99*3 
51-2 
1-5 
1-1 
8*0 
8-9 
8-1 
7*1 
9*9 
2*8 
1*3 
99*9 
2*88 
51 '0 
2*0 
14*0 
13-0 
6*0 
11*0 
2*0 
1*0 
100*0 
2*75 
50-6 
•8 
1-7 
10-3 
4-9 
7-7 
9*3 
9*4 
2*8 
1*2 
98*7 
49-7 
1-5 
9-4 
15-7 
1-2 
9*4 
10*3 
2*8 
*2 
100*0 
49-7 
1-7 
1-1 
1-1 
12-9 
7-4 
4-8 
6*6 
10*3 
3*0 
1*3 
100*0 
2*92 
49*1 
2*3 
•3 
13-4 
6-5 
5-9 
9*6 
8*9 
3*4 
1*0 
100*4 
49-0 
2’5 
15*0 
11*5 
9*7 
9*5 
2*5 
*3 
100*0 
48-0 
1-9 
•5 
2-2 
13-6 
2*9 
8-4 
8*7 
8*4 
3*4 
2*0 
100*0 
• . • 
46-7 
1-7 
11-7 
,2-7 
8-4 
11-3 
7*9 
6*0 
*8 
97*2 
46-6 
1-8 
•1 
32 
15-2 
35 
7-8 
8*7 
10*1 
2*4 
*7 
100*5 
2*87 
46-6 
3-1 
2-1 
9*6 
14-7 
10*1 
8*6 
2*6 
1*8 
99*2 
2*90? 
17 rocks 
50-2 
•9 
•2 
1-4 
11-8 
6-0 
6-7 
8*9 
9*4 
2*8 
1*2 
99*7 
2*92 
±i*i 
±1-7 
±1-4 
±1*0 
±1*0 
±6*2 
