FOR DETERMINING THE MEAN DENSITY OF THE EARTH. 
341 
Table (continued). 
No. 
Description of Rock. 
Thickness. 
Specific 
Gravity. 
Tempera- 
ture of 
water, 
Centigrade. 
88 
89 
90 
91 
92 
93 
94 
95 
96 
97 
98 
99 
100 
101 
102 
103 
104 
105 
106 
107 
108 
109 
no 
111 
112 
113 
114 
115 
116 
117 
118 
119 
120 
121 
122 
123 
124 
125 
126 
127 
128 
129 
130 
131 
132 
133 
134 
135 
136 
137 
138 
139 
140 
141 
142 
Black Slaty Coal 
Grey Shale with Sandstone Girdles 
Bituminous Shale with Clay Ironstone Girdles. 
Coal 
Dark Grey Shale with Sandstone Girdles 
Hard White Sandstone with frequently hard Shale and small Ironstone 
Nodules very coarse, and a little Water 
Dark Blue Shale with Nodules and Ironstone Girdles 
Grey Shale with Sandstone Girdles 
Bituminous Shale 
Coal, strong and good 
Grey Shale with Sandstone Girdles 
White Sandstone with a little Water 
Grey Shale with Ironstone Girdles 
Coal 
Bituminous Shale 
Coal 
Bituminous Shale 
Bituminous Shale mixed with Coal pipes 
Grey Shale 
Hard Shale 
Grey Shale with Sandstone Girdles 
Strong Grey Sandstone with Shale partings, and very hard Sandstone 
Girdles with a little Water 
Blue Shale Girdle 
White Sandstone Girdle with Shale partings 
Coal 
Grey Shale with Ironstone Nodules 
Strong Grey Shale with Sandstone Girdles 
Strong dark Grey Shale with Sandstone Girdles 
Splint Coal 
Grey Shale with Sandstone Girdles 
Strong White Sandstone with very hard Girdles 
Very hard Sandstone 
Hard Grey Shale with Sandstone and Ironstone Girdles. 
Black Slaty Bituminous Shale 
Coal ‘. 
Bituminous Shale 
Shale 
Hard Grey Shale with verv hard Sandstone Girdles 
Coal “ 
Hard Grey Shale with mild and also very hard Sandstone Girdles 
Coal 
Bituminous Shale 
Coal 
Shale 
Bituminous Shale 
Splinty Coal 
Grey Shale 
Dark Grey Shale with Ironstone Girdles 
Grey Shale with Ironstone Girdles 
Grey Sliale with Shale partings and very hard Sandstone Girdles 
Dark Grey Shale with Ironstone Girdles 
White Sandstone with very hard Girdles 
Grey Sandstone with Shale partings and very hard Girdles 
Bituminous Shale 
Top Coal ^ 
Splint ... VBensham Coal Seam. 
Bottom Coal ... J 
ft. in. 
1 5i 
15 8 
3 0 
H 
1 
16 
64 7 
6 11 
6 0 
7 5 
6 
21 0 
19 0 
6 0 
1 2 
1 
3 0 
6 
5 6 
21 0 
27 0 
40 5 
2 Oi 
2 3 
1 10 
4 0 
10 0 
14 0 
5 
10 0 
12 0 
8 0 
33 
1 
4 
7 
25 
1 
6 
11 
15 0 
8 0 
1 
0 
9 
3 
0 
9 
3 
3 
H 
2 
3^ 
2 
H 
2 
2 
3 
5 
21 
2-5483 
2-5178 
2-5209 
1 - 2956 
2 - 3250 
2-3942 
2-6000 
2-6066 
2-6641 
2-6146 
2-6481 
2-6763 
2-6021 
2-8178 
2-5591 
6 0 
2-6146 
1-2869 
8 - 5 
9 - 5 
17 - 1 
18 - 1 
4-8 
9-1 
9-6 
7-3 
9-6 
15-2 
7-7 
7-4 
5-3 
16-8 
8-3 
8-7 
