The Economy of a Coal Field: An Exposition of the Objects of the Geological and Polytechnic Society of the West Riding of Yorkshire, and of the Best Means of Attaining ThemAndrews, 1838 - 78 Seiten |
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The Economy of a Coal Field: An Exposition of the Objects of the Geological ... James Finlay Weir Johnston Keine Leseprobe verfügbar - 2016 |
The Economy of a Coal Field: An Exposition of the Objects of the Geological ... James Finlay Weir Johnston Keine Leseprobe verfügbar - 2016 |
The Economy of a Coal Field: An Exposition of the Objects of the Geological ... James Finlay Weir Johnston Keine Leseprobe verfügbar - 2017 |
Häufige Begriffe und Wortgruppen
attention bar iron beds benefit cannel coal carbonic acid chemical Chillington clay cleat coal measures coal-field coking cold blast colliery combustible connected considered cooling cost county of Durham Davy lamp deposits depth discovery district draining duce duration of coal economy effect Elsecar employed engines enquiries extent fathoms feet fire damp fossil GEOLOGICAL AND POLYTECHNIC geological position heating power hitherto hot air hot blast iron important improvement increase interest iron trade labour Leeds less lignin limestone locality loss Low Moor magnesian main coal manufacture material matter method millions of tons Monkwearmouth nature neighbourhood Newcastle objects observations obtained occur pig iron Polytechnic Society practical present produced profit puddling furnace quantity raised refining process regard render rocks sandstone slag smelting springs Staffordshire steam strata supposed surface temperature thickness tion trap dykes varieties of coal ventilation Wallsend waste West Riding Whitehaven workable
Beliebte Passagen
Seite 36 - The number and description of the seams of coal and other minerals it contains. 4°. The thickness and quality of the several seams of coal ; which of them have been worked — to what extent — and why the working of any of them has been discontinued or not commenced.
Seite 58 - Some irons, however, are so exceedingly fibrous that they admit of a limited use of cinders without deterioration. By omitting the refining...
Seite 66 - The management of large bodies of workmen is a subject of great importance. It is an art of great delicacy, which most people think very easy to be acquired, and yet which very few persons ever thoroughly attain. The first object should be to instruct them, so that when you appeal to their reason you may be certain of being understood.
Seite 1 - By the Geological and Polytechnic Society of the West Riding of Yorkshire: their " Proceedings," for 1858-9. By the Leeds Philosophical and Literary Society : their " Annual Report
Seite 22 - The hydrogen and oxygen of vegetables is derived from water ; and it is worthy of notice that the great mass of vegetables consists of carbon and water, or of carbon with oxygen and hydrogen in the proportion to form water. The nitrogen of vegetables is derived chiefly, if not exclusively, from ammonia ; which is supplied to them in rain, or from the soil in the water absorbed by the roots. There is evidence that humus is not absorbed as such by plants, but rather that it decomposes or decays...
Seite 20 - These facts shew how very difficult it must be, to say before-hand what supply a given coal-field is capable of yielding — so many data remaining yet to be ascertained, before we can pronounce whether this or that bed should be taken into the account, or should be rejected as unlikely ever to become available...
Seite 14 - The immediate interest both of the lessor and the lessee, but especially of the latter, whose interest ceases after a term of years, has too often been at variance with the true interests of the nation. It...
Seite 19 - With respect to the effect produced in the mines by this progressive improvement of the steam-engine, two kinds of statement have been exhibited. The first, shewing cases of mines previously abandoned, but resumed with profit and effect : and the second, where the increase of power and saving of fuel have rendered profitable, undertakings which, though still continued, were sinking under...
Seite 15 - In working the best seams in a district also, sufficient care is not always taken to preserve uninjured higher* and less valuable seams, which at a future day may afford an ample return to the miner. You will...