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Bucket of tin ore rises from mine in ore elevator / ore falls down crated chute / Title card: "The first crushing" / ore shoveled into vibrating opening in crusher / man shovels crushed ore out at bottom of crusher into suspended bucket / Title card: " - and then a long journey to the stamping and washing mill." / young boys push ore buckets suspended from cable of the ropeway conveyor or gondola lift, the buckets continue up to supporting towers and mill beyond / buckets back and forth on cables / VS younger boys at mill end push buckets around end tower and dump them before pushing them back / boy shovels the ore down a chute / Title card: "Here it is stamped into a fine powder. A machine which is practically a large mechanically worked pestle and mortar does it." / CU pestle up and down / Title card: "Finally a series of washing operations separate all the extraneous matter (sand, etc.) - " / young man adjusts sprinkler arms in large round vat / sprinkler arms turn in washing vat / Note: exact month/date not known