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Books Bücher 1 - 6 von 6 in ... the mine abandoned. In large irregular masses of rock, the depth of the bore,...
" ... the mine abandoned. In large irregular masses of rock, the depth of the bore, or the intervals between the blasts, will generally represent the line of least resistance, and the following results were obtained in the rock at Delhi, which is hard quartz.... "
Rudimentary Treatise on the Blasting and Quarrying of Stone for Building and ... - Seite 76
von Sir John Fox Burgoyne (bart.) - 1849 - 106 Seiten
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Newton's London Journal of Arts and Sciences: Being Record of the ..., Band 13

William Newton, Charles Frederick Partington - 1839
...obtained in the rock at Delhi, which is hard quartz. The line of least resistance not exceeding one foot, a charge of 2 oz. is sufficient ; the line not...4, 5, 6 feet, the charge will be 4, 8, 14, 20, 26, 36 ounces. The author is of opinion, that notwithstanding the increased expenditure of gunpowder when...
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The London Journal of Arts and Sciences, Band 13

1839
...obtained in the rock at Delhi, which is hard quartz. The line of least resistance not exceeding one foot, a charge of 2 oz. is sufficient; the line not...tenacity of the rock, but the following may be a general guide:—the line of least resistance being 1, 2, 3, 4,5, 6 feet, the charge will be 4, 8,14,20,26,...
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The London journal of arts and sciences (and repertory of patent inventions ...

William Newton - 1839
...obtained in the rock at Delhi, which is hard quartz. The line of least resistance not exceeding one foot, a charge of 2 oz. is sufficient; the line not...tenacity of the rock, but the following may be a general guide:—the line of least resistance being I, 2, 3, 4, 5, 6 feet, the charge will be 4, 8, 14, 20,...
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The Railway magazine (and annals of science) [afterw.] (and steam navigation ...

1839
...least resistance, and the following results were obtained in the rock at Delhi, which is hard quartz. The charges will vary with the tenacity of the rock,...being 1, 2, 3, 4, 5, 6 feet, the charge will be 4, 8, H, 20, 20, .';6 ounces. The line of least resistance not exceeding one foot, a charge of 2 ozs. is...
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Minutes of Proceedings of the Institution of Civil Engineers, Band 1

Institution of Civil Engineers (Great Britain) - 1848
...of 2 oz. is sufficient ; the line not exceeding 4 feet, and the rock not being highly chrystalline, 3 oz. per foot will be sufficient. The charges will...guide : — the line of least resistance being 1, 1, 3, 4, 5, 6 feet, the charge will be 4, 8, 14, 20, 26, 36 ounces. On comparing the charges used at...
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Minutes of Proceedings of the Institution of Civil Engineers, Band 1

Institution of Civil Engineers (Great Britain) - 1848
...obtained in the rock at Delhi, which is hard quartz. The line of least resistance not exceeding one foot, a charge of 2 oz. is sufficient ; the line not exceeding 4 feet, and the rock not being highly chrystalline, 3 oz. per foot will be sufficient. The charges will vary with the tenacity of the rock,...
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