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Milling methods and costs at the concentrator of the Britannia Mining & Smelting Co., Ltd., Britannia Beach, B.C.
Employee-timekeeping system and mechanical pay-roll methods at Britannia Mining & Smelting Co. (Ltd.), Britannia Beach, B.C.
Mining operations at the property of the Britannia Mining and Smelting Co., Ltd., Britannia Beach, British Columbia