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explain wedging and blasting methods of stone quarry

At times, blasting was also used to free the stone from the quarry wall because it was cheaper and easier than channeling and wedging. The drawback of blasting brownstone was that more stone was lost. Most of the time, blasting was only used when quarrying for rubble and stone for cellar walls (“The Manu-facturer and Builder”, 1891). Figure 1.

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