134 Proceedings of tlie Royal Society of Edinburgh. [Sess. 
List of 1000 Rocks 
Group . 
Si 0 2 . 
Ti 0 2 . 
p 2 o 6 ' 
H 2 0. 
A 1 2 0 3 . 
Fe 2 0 3 . 
FeO . 
MgO . 
CaO . 
Na 2 0. 
K 2 0. 
Total . 
Sp . Gr . 
45 
46-2 
7*7 
17*0 
5*2 
•9 
7 T 
10*2 
2*4 
4*0 
101*0 
45*7 
3-3 
*2 
4-8 
14-3 
4*1 
5-6 
2-7 
10*4 
5*5 
3*6 
100*1 
2*77 
15 rocks 
49-0 
•9 
•4 
2-4 
17-9 
3-8 
3-8 
5-0 
11*1 
4*2 
2*1 
100*6 
2*82 
s 
±1*5 
±1-9 
± i -3 
±2*5 
±2*2 
±9*4 
46 
b a b b a b 
50-3 
1-8 
18-7 
6 T 
4-3 
4*7 
9*4 
4*1 
1*4 
100*6 
50-2 
•3 
(•5) 
22-7 
3*3 
3-6 
4*5 
10*4 
3*3 
1*2 
100*0 
50'2 
1-1 
19*4 
8-2 
7*1 
10*2 
3*8 
1*2 
101*3 
not 
49*7 
•2 
(•8) 
20-8 
1-0 
5*5 
6*5 
10*8 
3*5 
1*4 
100*2 
given 
49-6 
•4 
*2 
2-0 
14-5 
3-5 
5-5 
6*2 
9*6 
3*5 
5*6 
100*8 
49-3 
T 
21-6 
2-3 
7 3 
7*8 
10*2 
2*1 
*3 
101*0 
2*97 
49-2 
•3 
•8 
17**7 
6*9 
2-0 
4*2 
12*7 
2*1 
5*2 
101 T 
2*88 
48-4 
IT 
20-3 
4*0 
6*4 
8*1 
8*8 
1*8 
2*0 
100*9 
48-4 
23-7 
8-0 
6*6 
11*0 
2*6 
IT 
101*4 
47-9 
5-0 
19 T 
4*3 
2*0 
6*4 
6*2 
2*5 
5*5 
98*9 
47-3 
1-5 
1-6 
T 
18-3 
2-2 
6*9 
6*8 
7*9 
6*0 
1*0 
99*6 
2*86 
47-3 
•3 
•7 
21 T 
3-5 
4 T 
8*1 
13*4 
1*5 
*3 
100*2 
2*95 
46-6 
3*5 
21-6 
2-9 
6*4 
6*5 
9*3 
3*2 
*9 
100*9 
... 
46-4 
•3 
•6 
26*3 
2-0 
33 
4*8 
15*3 
1*6 
*2 
100*8 
2*88? 
45-9 
1*0 
21-2 
2-2 
7 T 
7*8 
10*5 
3*2 
IT 
100*0 
2*98 
45-7 
2-8 
20-5 
2-0 
4-2 
8*5 
11*6 
3*6 
*8 
99*8 
45-4 
2-8 
ro 
18-6 
•8 
6-8 
7*5 
13*2 
2*3 
1*3 
99*5 
44*3 
4 T 
17-2 
4-6 
3-8 
6*6 
10*4 
4*5 
3*6 
99*1 
18 rocks 
47-9 
•4 
•1 
1*4 
20-2 
3-8 
4-4 
6*6 
10*6 
y 
3*1 
1*9 
100*3 
2*91 
±1-4 
±2‘0 
±1-2 
±1*8 
±1* 
'7 
±8*1 
! 47 
b a b b b a 
51*4 
•6 
•7 
IT 
18-5 
2-9 
5-2 
1*3 
7*3 
6*7 
4*4 
100*1 
2*75 
51*1 
1*4 
•9 
21 T 
•9 
5-6 
2*8 
5*3 
6*4 
4*2 
99*7 
49-9 
1-2 
24-4 
6‘1 
3*9 
9*6 
5*3 
*3 
100*7 
49-3 
•8 
•6 
3-5 
16 T 
7-9 
3-4 
2*7 
8*0 
5*2 
3*4 
100*9 
2*63 
48-7 
1-8 
18-9 
3-2 
8-0 
4*8 
9*9 
4*1 
1*5 
100*9 
48-7 
2*7 
1*1 
1-0 
17-9 
3 T 
6-6 
3*1 
7*4 
6*0 
2*6 
100*0 
48 '6 
1-8 
17-9 
6-2 
5-8 
4*3 
9*1 
4*7 
2*1 
100*4 
2*77 
48*5 
1-7 
2 T 
21-3 
1*0 
5-5 
4*1 
7*4 
4*9 
3*2 
99*7 
48-3 
•3 
1-7 
3-0 
16-6 
6’5 
1*2 
7*8 
9*4 
6*5 
101*3 
48*3 
2 T 
19-0 
6*7 
4-0 
3*5 
8*9 
5*0 
2*4 
99*9 
2*8*8 
47*4 
•1 
23-6 
4-6 
1-2 
•7 
4*4 
15*1 
2*0 
99*1 
46-6 
1-0 
24-4 
2-6 
6-4 
1*6 
10*4 
5*5 
1*4 
99*9 
46*5 
1*0 
4-7 
16-2 
6*2 
6 T 
y 
4*0 
7*4 
5*9 
3*1 
100*9 
2*72 
44*5 
1*4 
2 T 
23-0 
6-8 
1*6 
8*7 
6*7 
4*8 
99*6 
43*7 
•9 
1-3 
•9 
19-8 
3 3 
3*5 
3*9 
10*3 
9*8 
2*9 
100*3 
43-0 
•6 
•7 
24*6 
3-6 
2-2 
2*0 
5*5 
14*8 
3*0 
100*0 
• . . 
42-8 
1*7 
1-7 
1-0 
19-9 
4-4 
2-7 
1*9 
11*8 
9*3 
1*7 
98*8 
