Merrill, George P. · John Wiley & Sons, Chapman & Hall, Ltd., · leaf 294
edges excavation iscommenced, first by blasting, to remove the weathered andworthless material, and afterward by channeling, drilling, andwedging ; no powder being used lest the fine massive blocksbecome shattered and unfit for use. The quarry thus descendsin the form of a rectangular pit, with…
Decoration and ornament, Architectural · Quarries and quarrying · Building stones
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