REV. W. THORP, B.A. — AGRICULTURAL GEOLOGY, ETC. 237 
amount to 3,000,000 tons. It is exceedingly rich in iron, containing 
45 per cent. ; while none of the Yorkshire ironstones in the coal 
district contain more than 33 per cent. The ironstone in Eskdale is 
a firm, heavy, dark-coloured rock. The one at Eston is reddish-white, 
not particularly heavy, and looks in appearance like a ferruginous 
limestone. Mr. Thorp considered it probable that the ironstone of 
the Oolites of Northamptonshire is on the same geological horizon, 
and he concludes by stating that it is his opinion that this ironstone 
may be continuous from the valley of the Esk, for a distance 12 or 14 
miles to Eston, and that wherever the bottom of the oolite can be 
approached large deposits of iron may be expected, but that southwards 
it is almost certain that this deposit has disappeared, although it may 
reappear in Northamptonshire. 
Other references to the papers and work of Mr. Thorp will be 
found in previous and following pages. 
