 | Edmund Burke - 1864 - 776 strani
...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... | |
 | 1863 - 376 strani
...mining operations, and rejecting all seams of less than 2 feet in thickness, the entire quantity of available coal existing in these islands has been...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... | |
 | 1863 - 728 strani
...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.... | |
 | 1863 - 788 strani
...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... | |
 | 1863 - 404 strani
...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... | |
 | 1864 - 848 strani
...to cany on mining operations, and rejecting all seams of less than two feet in thickness, the entire available coal existing in these Islands has been...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... | |
 | James Samuelson, William Crookes - 1864 - 876 strani
...carry on mining operations, and rejecting all seams of less than two feet in thickness, tho entire available coal existing in these Islands has been...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... | |
 | British Association for the Advancement of Science - 1864 - 1112 strani
...mining operations, and rejecting all seams of less than 2 feet in thickness, the entire quantity of available coal existing in these Islands has been...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... | |
 | 1864 - 470 strani
...operations, and rejecting all seams of less than two feet in thickness, the entire quantity of available Goal existing in these islands has been calculated to amount...930 years, but, with a continued yearly increase of 2f millions of tons, would only last 212 years. It is clear th.it long before complete exhaustion takes... | |
 | William George Baron Armstrong, Isaac Lowthian Bell, John Taylor, Thomas Richardson - 1864 - 480 strani
...mining operations, and rejecting all seams of less than 2 feet in thickness, the entire quantity of available coal existing in these Islands has been...the present rate of consumption, would be exhausted iii 930 years, but with a continued yearly increase of 2,750,000 tons, would only last 212 years. It... | |
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Assuming 4,000 feet as the greatest depth at which it will ever be possible to carry on mining operations, and rejecting all seams of less than two feet in thickness, the entire quantity of available coal existing in these islands has been calculated... 
