340 
MR. airy’s account OF THE BARTON EXPERIMENT 
Table (continued). 
No. 
Description of Rock. 
Thickness. 
Specific 
Gravity. 
Tempera- 
ture of 
water, 
Centigrade. 
37 
Grov Shale and Water 
ft. 
3 
in. 
4 
0 
38 
Coal 
6 
39 
40 
Bituminous Shale 
3 
Coal 
3 
41 
Orev Shalft with Sandstone frirdies 
8 
4 
42 
Coal 
3 
43 
44 
Grey Shale 
Coal 
5 
2 
2 
45 
Grey Shale with thin Sandstone Girdles and Water 
23 
7 
2-5525 
15-8 
46 
Coal. Brassev Rand, and Coal 
2 
10 
1-3117 
16-1 
47 
48 
49 
50 
Grev Slialft 
4 
0 
2-5736 
10-0 
Grey Shale, Sandstone Girdles, and Water 
Sandstone, and Water 
15 
45 
1 
0 
2-5687 
2-6695 
10-3 
8-8 
Dark Grey Shale 
Coal 
12 
0 
2-5962 
9-9 
51 
1 
8 
1-3474 
7-7 
52 
Grey Shale or Thill 
4 
0 
53 
Grey Sandstone and Water 
5 
2 
54 
White Sandstone with Shale nartinp’s and Water 
116 
8 
2-8016 
16-0 
55 
Dark Grey Shale 
Coal 
l 6 
3 
2-6132 
16-4 
56 
8 
37 
58 
Dark Grey Shale 
Coal 
16 
3 
2-6233 
4-8 
5 
59 
60 
Brown Shale 
6 
Grey Sandstone w'i 
Hvdroo'en Gas.. 
th Shale partings and salt water, emitting Carburetted 
7 
31 
2-5410 
16-9 
61 
Red and White Sandstone, porous and wet 
53 
8 i 
2-8163 
8-4 
62 
Coal mixed with hard Bituminous Shale 
3 
1-7010 
8-4 
63 
Soft Grev Shale .. 
7 
0 
2-5184 
9-5 
64 
Strong Rituminons Shale mixed with Nodules of Clav Ironstone 
1 
5 
2-2587 
9-5 
65 
Coal 
2 i 
66 
Strong light-coloured Grey Sandstone with Shale partings and very hard 
Girdles 
10 
0 
2-6595 
9-1 
67 
68 
Dark Grey Shale 
Coal 
Bituminous Band 
Coal 
10 
7 
2-5734 
17-5 
1 
8 
1-4839 
17-5 
69 
70 
71 
n 
73 
74 
75 
76 
77 
78 
79 
80 
Bituminous Band 
Coal 
Hard Grey Shale 
Dark Grey Shale 
Foul Coal 
with very hard Sandstone Girdles 
27 
4 
2-6223 
7.7 
with Girdles of Clay Ironstone 
15 
10 
2-5416 
8-9 
5 
Dark Grey Shale 
Hard dark Grev S 
2 
6 
2-7073 
18-5 
)hale with Sandstone Girdles 
12 
0 
2-2660 
9-5 
Coal ", 
5 
Grey Shale 
1 
8 
White Sandstone with very hard Girdles and Water 
24 
11 
2-5334 
9-0 
Cnal 0 ft. 4 in.. Slatv Cnal"! ft. 1 in. — 1 ft. 5 in 
1 
5 
tirev Shale 
2 
7 
Coal . 
6 
Dark Grey Shale 
White Sandstone 
with Sandstone Girdles and Water 
14 
1 
2-6434 
9-3 
81 
with Shale partings 
13 
111 
2-5613 
7-8 
82 
Grev .Shale 
1 
4 " 
83 
Coal, .stfonff and (mod 
2 
6 
84 
Snliiit Coal 
6 
85 
Grey Shale 
1 
6 
86 
iStronp- Whitp SanrUtorip. verv hnrd in olaces. and water 
43 
81 
2-4969 
15-5 
87 
Bituminous Shale 
31 
