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Results for: 'metal'

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Traditional Collection Methods

By: uvmext

Traditional methods of sap collection have changed over time. Initially, Native Americans created gashes in the stem, and directed sap into wooden or bark vessels. Early spouts were created by hollowing out small twigs, which were inserted into ta...

11:07

Chapt 2 Chemical and Physical Hazards

By: tpritcha

This is a video identifying chemical hazards and their sources. Physical hazards are also identified and control measures are identified.