...which now goes on. The quantity now underground which might be considered available was estimated at 80,000 millions of tons, which at the present rate...consumption would be exhausted in 930 years, but with increase of consumption might only last 212 years. The possibility and necessity of economizing, both...

...thickness, the entire quantity of available coal existing in these islands has been calculated to amount to about 80,000 millions of tons, which, at the present...930 years, but, with a continued yearly increase of 2£ millions of tons, would only last 212 years. It is clear that long before complete exhaustion takes...

...quantity of available cost existing in these islands has been calculated to amount to about 80,000,000,000 tons, which, at the present rate of consumption, would be exhausted in 930 years; but with the continued yearly increase of two millions and three-quarters of' tons would only last 212 years....

...of available coal existing in those islands has been calculated to amount to about eighty thousand millions of tons, which, at the present rate of consumption, would be exhausted in nine hundred and thirty years." If, however, tho rato of consumption should go on increasing according...

...of available coal existing in these islands has been calculated to ainouut to about eighty thousand millions of tons, which, at the present rate of consumption, would be exhausted iu nine hundred and thirty years ; but, with a continued yearly increase of two millions and three...

...thickness, the entire quantity of available Goal existing in these islands has been calculated to amount to about 80,000 millions of tons, which, at the present...of 2f millions of tons, would only last 212 years. It is clear th.it long before complete exhaustion takes place, England will have ceased to be a coal...

...thickness, the entire quantity of available coal existing in these islands has -been calculated to amount to about 80,000 millions of tons, which, at the present...930 years, but, with a continued yearly increase of two and three-fourths millions of tons, would only last 212 years. It is clear that long before complete...

...thickness, the entire quantity of available coal existing in these Islands has been calculated to amount to about 80,000 millions of tons, which, at the present...930 years, but, with a continued yearly increase of 2| millions of tons, would only last 212 years. It is clear that long before complete exhaustion takes...

...in thickness, tho entire available coal existing in these Islands has been calculated to amount to about 80,000 millions of tons, which, at the present...930 years ; but, with a continued yearly increase of two millions and three quarters of tons, would only List two hundred and twelve years." * Mr. Grecnwcll...

...in thickness, the entire available coal existing in these Islands has been calculated to amount to about 80,000 millions of tons, which, at the present...930 years ; but, with a continued yearly increase of two millions and three quarters of tons, would only last two hundred and twelve years" * Mr. Greenwoll...