TEW: EXTENSION OF MINING OPERATIONS. 
93 
GRAINS PER GALLON. 
Brought Forward 8935-94 
„ „ Calcium 8-96 
„ „ Magnesium 368-90 
Iodide of „ 0-08 
Bromide of „ 43.39 
Carbonate of Iron ... ... ... ... 2-90 
Total solids per gallon 9860-17 
Specific Gravity 1-1 
This analysis of the Ryhope Brine is furnished by Mr. T. W. 
Embleton, of Methley. 
These waters are strong-er than the salt waters pumped up at 
Droitwich, and contain ingredients different to those of ordinary 
sea water. 
When you last assembled in this Town Hall, Mr. John Rhodes, 
the thrice elected Mayor of Pontefract, had not reached the coal 
at his " Prince of Wales " Colliery, but on the 1st of August, 1872, 
the Haigh Moor Bed was reached, at a depth of 477 yards, or 
thereabouts, from the surface; the coal, with two dirt partings, is 5 
feet 6 inches in thickness. 
This excellent coal possesses many valuable properties. Its 
illuminating power, by the method frequently adopted by Gas 
Engineers, is 14-5 ; density 0'528 (air= 1). Percentage of defiant 
gas and similar substances 6*50. The number of cubic feet of gas 
per ton of coal 8,(512. 
The machinery at the " Prince of Wales" Colliery is capable 
of raising to the pit bank some 500 to 600 tons of coal every day. 
The colliery is ventilated by the most approved fan, 40 feet in 
diameter, the fanners being 10 feet in width and making some 35 
revolutions per minute. 
In addition to the coal which the enterprise of the Mayor is 
bringing to the surface, there are at about 30 feet below the ground, 
valuable beds of clay from 12 to 15 feet in thickness, which when 
chemically and microscopically examined revealed abundant evi- 
dence of organic matter, and of the extinct Flora of the Carboni- 
