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STATISTICAL RETURNS OF THE MINERAL PRODUCE OF 
YORKSHIRE FOR THE YEAR 1857. BY ROBERT HUNT, 
ESQ., F.R.S., KEEPER OF THE MINING RECORDS. 
Having recently completed my annual Statistical Report 
of the Mineral productions of the United Kingdom, I feel 
that it cannot be without interest to the meeting of the 
Geological and Polytechnic Society, to communicate 
the returns which have been obtained from Yorkshire. 
These will be found to be fairly complete, and to represent 
very accurately the present state of the Mineral Industries 
of that important county. 
Lead. — The produce of the Lead Mines has been as fol- 
lows : — 
Lead 
Ore. 
Lead. 
Tons. 
Cwt. 
Tons. 
Cwt. 
Braithwaite 
91 
17 
65 
0 
Cononley 
538 
14 
388 
8 
Grassington, including Yarnbury 
and Coalgrove Beck 
1,449 
10 
1,049 
4 
Hebden Mines 
275 
2 
182 
2 
Ketllewell, Conistone, and Buck- 
150 
0 
105 
0 
2,550 
0 
1,643 
0 
6,326 
0 
3,722 
0 
190 
8 
130 
0 
60 
0 
44 
10 
760 
0 
535 
14 
Teesdale Mines (in Yorkshire)... 
14 
10 
10 
16 
12,405 
19 
7,875 
12 
The produce of Lead Ore and Lead were, in 1856, respec- 
tively 12,174 tons 7 cwt. and 8,986 tons 2 cwt., showing an 
increase of 231 tons 12 cwt. on the Ore, and a decrease 
in the quantity of Lead produced to the extent of 1,110 tons 
