304 The Philosophical Society of Glasgoin. 



At Lesmahagow the coal in this position has been long famous, and 

 is second in quality only to the famous Boghead coal. At Govan it is 

 not of such good quahty. It covers an extensive area in the parish of 

 Govan, and extends across the river Clyde to Knightswood and Seate- 

 rigg, where it has been long worked for gas-producing purposes. 



At Cleuch, near Wilsonton, in the parish of Carnwath, this seam of 

 coal is also worked, and is of the same quality as that at Govan and 

 Knightswood. Estimated area stUl to work in these districts, 1,700 acres. 



Govan Band Ieonstone. — At 502 Fathoms — Average Thickness, 12 

 Indies. — This ironstone has only lately been opened up at Govan. It 

 is believed to extend over the same area as the Possil ironstone, although 

 it has not been so extensively proved, and is in the same position as the 

 ironstone worked at Dairy, in Ayrshire, and Banton, in Stirlingshire. 

 It is of very superior quahty, and can be generally cheaply worked. 

 Estimated area still to work, 7,800 acres. 



StTMMAEY. — The workable seams of coal which I have referred to are 

 ten in number, viz. : — The Upper, the Ell, the Pyotshaw, the Main, the 

 Humph, the Splint, the Sour Milk, the Virtue Well, the KUtongue, and 

 Drumgray — all as seen on the accompanying section. They are all 

 valuable seams, and extensively used for household and manufacturing 

 purposes ; and in these seams the total quantity of available coal still 

 to work is about 424,620,700 tons. Taking the present annual output 

 of the district under consideration at 3 J miUions of tons, this quantity 

 of coal will last 130 years. 



Besides the coals named, and taken into account, there are numerous 

 other seams, which, from their inferiority either of position, thickness, 

 or quality, will not be worked, or at least only to a hmited extent, so 

 long as those I have described yield a sufficient supply. Amongst 

 these we may mention the coals in the Bo'ness field, which (although 

 some of them are of five feet thickness, and notwithstanding that they 

 are situated all within a mile of the Kinniel Iron-works) are so inferior 

 in quahty, as to be considered at present unworkable to profit. 



In the Bathgate field there are four or five seams which are also of 

 second-rate quality ; and although entirely opened up by the Monklands 

 Railways, they cannot be worked as yet to compete in the same market 

 with the other seams worked in the Wishaw and Monkland districts. 



The number of ironstone bands described and shown in the section 

 is twelve. Nearly one-half of these being, so far as now known, of 

 doubtful value, I have made no estimate of them, and have taken only 

 seven into the calculation. These are, first, the celebrated Mushet 

 blackband ironstone, the Rough band, the Bellside band, the Calderbrae 

 band, the Slaty band, the Possil band, and the Govan band ironstone. 



