 ... direction of the intended separation, along which a groove is cut with a chisel about a couple of inches in depth. Above this groove a narrow line of fire is then kindled, and maintained till the rock below is thoroughly heated, immediately on which...  The American Library of Useful Knowledge - Page 3011831 - 320 lehteFull view - About this book
 | 1834 - 614 lehte
...is thoroughly heated, immediately oil which a line of men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, and pour the water iuto the heated groove, when the rock at once splits with a clean fracture. Square blocks of six feet... | |
 | John Frederick William Herschel - 1831 - 310 lehte
...below is thoroughly heated, immediately on which a line of men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, and pour...particulars of mineralogical detail.* (40.) Ex. 5. (:$5.) III. Hardly less simple and efficacious is the process used in some parts of France, where mill-stones... | |
 | 1831 - 660 lehte
...men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, and pours the water into the heated groove, when the rock at...easily explained without entering into particulars of mincralogical detail. ' Ex. 5. Hardly less simple and efficacious is the process used in some parts... | |
 | 1831 - 616 lehte
...is thoroughly heated ; immediately on which, a line of men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, and pour...clean fracture. Square blocks, of six feet in the *ifle, and upwards of eighty feet in length, are sometimes detached by this method. Such a block would... | |
 | 1831 - 896 lehte
...below is thoroughly heated, immediately on which a line of men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, and pour...once splits with a clean fracture. Square blocks of 6 feet in the side and upwards of 80 feet in length,* are sometimes detached by this method, or by... | |
 | Perry Fairfax Nursey - 1831 - 514 lehte
...the ruck at once splits with a clean fracture. Square blocks of б feet in the side and upwards of 80 feet in length,* are sometimes detached by this method,...easily explained without entering into particulars of mineralógica! detail." Mr. Herschel winds up this branch of the subject with the following just observation... | |
 | 1831 - 444 lehte
...of men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, pours the water into the heated groove, when the rock at...a clean fracture. Square blocks of six feet in the aide, and upwards of eighty feet in length, are sometimes detached by this method, or by another equally... | |
 | 1831 - 336 lehte
...below is thoroughly heated, immediately on which a line of men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, and pour...into the heated groove, when the rock at once splits \vith a clean fracture. Square blocks of six feet in the side, and upwards of eighty feet in length,... | |
 | Samuel Drew - 1831 - 658 lehte
...groove, when the rock at once splits with • clean fracture. Square blocks, of six feet in the Mil.', and upwards of eighty feet in length, are sometimes detached by this method. Such a block would weigh ncnrlv 300,000 pounds. — ïlertckeFt Ditcvurtt он \atnrai t-'fiiivxiHJiu.... | |
 | British Museum. Department of Egyptian Antiquities - 1832 - 440 lehte
...below is thoroughly heated, immediately on which a line of men and women, each provided with a pot full of cold water, suddenly sweep off the ashes, and pour...heated groove, when the rock at once splits with a clear fracture. Square blocks of 6 feet in the side, and upwards of 80 feet in length, are sometimes... | |
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