On Coal at Home and Abroad: With Relation to Consumption, Cost, Demand, and Supply and Other Inquiries of Present Interest; Being Three Articles Contributed to the Edinburgh Review, with an Appendix |
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Page 22
... feet , there are beneath that limit , accord- ing to well - founded conjectures as to what lies below and between ... feet , while 15,302 millions might be found at depths of from 6,000 to 10,000 feet . In respect of the temperature of ...
... feet , there are beneath that limit , accord- ing to well - founded conjectures as to what lies below and between ... feet , while 15,302 millions might be found at depths of from 6,000 to 10,000 feet . In respect of the temperature of ...
Page 23
... feet ; and of this quantity probably 5,922 millions of tons rest between the limits of 4,000 and 6,000 feet in depth , and the remaining 1,397 millions of tons at between 6,000 and 10,000 feet . Hence the combined totals of all coal ...
... feet ; and of this quantity probably 5,922 millions of tons rest between the limits of 4,000 and 6,000 feet in depth , and the remaining 1,397 millions of tons at between 6,000 and 10,000 feet . Hence the combined totals of all coal ...
Page 25
... feet , where the tem- pérature is 50 ° Fahr . The rate of increase of tempera- ture is in our coal mines generally 1 ° Fahr . for every 60 feet of depth . It is questionable , however , whether after a great depth the rate of increase ...
... feet , where the tem- pérature is 50 ° Fahr . The rate of increase of tempera- ture is in our coal mines generally 1 ° Fahr . for every 60 feet of depth . It is questionable , however , whether after a great depth the rate of increase ...
Page 26
... feet deep , and is still descending lower and lower . There the ratio of heat - increase agreed with the ordinary rate down to a depth of 1,800 feet , after which it became considerably more rapid . At the lowest point of the sinking ...
... feet deep , and is still descending lower and lower . There the ratio of heat - increase agreed with the ordinary rate down to a depth of 1,800 feet , after which it became considerably more rapid . At the lowest point of the sinking ...
Page 27
... feet ; so that the depth at which the temper- ature of the air would become , under present conditions , equal to the heat of the blood , would be about 3,420 feet . As to depths beyond this the Commission declined to speculate , but ...
... feet ; so that the depth at which the temper- ature of the air would become , under present conditions , equal to the heat of the blood , would be about 3,420 feet . As to depths beyond this the Commission declined to speculate , but ...
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Common terms and phrases
accidents America amount annual anthracite Author bituminous coal Britain British coal CATHERINE WINKWORTH cent coal fields coal mines coal owners coal seams coal-mining collieries consumption of coal cost of coal Crown 8vo Davy-lamp deaths deposits depth DICTIONARY districts Durham engineers England Essays estimate explosion extent extraction feet fire-damp Fourth Edition geological heat hewers History Illustrations increased inspectors iron JAMES ANTHONY FROUDE JOHN STUART MILL JOHN TYNDALL labour Lancashire late LECTURES less London LORD MACAULAY LORD MACAULAY'S manufacturing Maps medium 8vo millions of tons natural nearly North Northumberland pitmen pits Plates Post 8vo Practical present price 12s price 68 price of coal principal produce quantity Railway raised revised safety-lamps Science seams of coal Second Edition shaft South Staffordshire South Wales Square crown 8vo square miles Staffordshire Stigmaria thickness Third Edition tion tons of coal United Kingdom vegetation vols wages waste whole Woodcuts
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