 | Institution of Civil Engineers (Great Britain) - 1906 - 598 Seiten
...admitted, and the cleavage is rapidly extended till it comes out on the hillside in a thin edge. A sheet of several acres in extent may be raised in this manner, affording a bed-plane that is approximately horizontal, from which the quarrymen can break out blocks of any required... | |
 | Good Roads Institute, Chapel Hill, N.C. - 1897 - 1172 Seiten
...directions from the lift hole until the crevice extends a distance of 75 feet or more from the hole. acres in extent may be raised in this manner, affording...horizontal, to which the quarrymen can work, thus securing stone of any required thickness. The first time compressed air was used a pressure of 80 pounds... | |
 | 1906 - 504 Seiten
...the hillside in a thin edge, as indicated by the cross sectional sketch referred to above. A sheet of several acres in extent may be raised in this manner,...a bed plane approximately horizontal, to which the quarry Thin edge of sheet split from quarry men can work, thus securing stone of any required thickness.... | |
 | Institution of Civil Engineers (Great Britain) - 1906 - 540 Seiten
...admitted, and the cleavage is rapidly extended till it comes out on the hillside in a thin edge. A sheet of several acres in extent may be raised in this manner, affording a bed -plane that is approximately horizontal, from which the quarrymen can break out blocks of any required thickness.... | |
 | 1911 - 500 Seiten
...the hillside in a thin edge, as indicated by the cross sectional sketch referred to above. A sheet of several acres in extent may be raised in this manner,...horizontal, to which the quarrymen can work, thus securing stone of any required thickness. It will be observed from the accompanying sketch, that on... | |
 | Albert Irvin Frye - 1913 - 1698 Seiten
...admitted and the cleavage rapidly extended until it comes out upon the hillside in a thin edge. A sheet of several acres in extent may be raised in this manner,...horizontal, to which the quarrymen can work, thus securing stone of any required thickness. . . . The time [formerly] required for extending the cleavage... | |
 | Albert Irvin Frye - 1913 - 1694 Seiten
...hillside in a thin edge. A sheet of several acres in extent may be raised in this manner, atfording a bed plane approximately horizontal, to which the quarrymen can work, thus securing stone of any required thickness. . . , The time [formerly] required for extending the cleavage... | |
 | North Carolina. Geological Survey Section - 1906 - 382 Seiten
...comes out upon the hillside in a thin edge as indicated by the cross-section, figure 2. A sheet of several acres in extent may be raised in this manner,...horizontal, to which the quarrymen can work, thus securing stone of any required thickness. The first time compressed air was used a pressure of S0 pounds... | |
 | 1910 - 788 Seiten
...as that just described, THE RKCTORY. GI-ISH.KY, YORKSHTRF The walls and roof arc of Yorkshire stone until the crevice extends a distance of 75 feet or...a bed plane approximately horizontal, to which the qtiarrymen can work, thus obtaining stone of any required thickness. The first time this method was... | |
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A sheet of several acres in extent may be raised in this manner, affording a bed plane approximately horizontal, to which the quarrymen can work, thus securing stone of any required thickness. 