 | 1859 - 384 pagina’s
...made in the different levels of many mines whilst each level had successively been the deepest ;§ but it seems not to have been ascertained whether the temperature of any spot remained the same as it had been when the bottom of the mine, after other works, had been extended... | |
 | William Jory Henwood - 1871 - 294 pagina’s
...Smelting Magazine, vi. pp. 193—6 ; Бeреги of the British Astociation, for 1864, Part II. p. 70. (Abridged) * " Numerous observations show that,...subject, I venture to offer the following comparisons. whose shafts and (levels) galleries, water and vapour circulate more freely than they had previously... | |
 | William Jory Henwood - 1871 - 312 pagina’s
...and Smelting Magazine, vi. pp. 193—6 ; Reports of the British Astociation, for 1864, Part II. p. 70. (Abridged) • " Numerous observations show that,...subject, I venture to offer the following comparisons. whose shafts and (levels) galleries, water and vapour circulate more freely than they had previously... | |
 | Royal Geological Society of Cornwall - 1871 - 220 pagina’s
...• • • SMYTH, Mming and Smelting Magazine, vi. pp. 193—6 ; Reports of the British Asiociation, for 1864, Part np 70. (Abridged) • " Numerous observations...spot —after other openings were extended beneath it—remained the same as it had been when it was the bottom of the mine. To invite enquiry on this... | |
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Бeреги of the British Astociation, for 1864, Part II. p. 70. (Abridged) * " Numerous observations show that, whilst the conditions of the works on mines are unchanged, the temperatures at considerable depths are constant ; but it seems not to have... 