Teachers and administrators at commencement place their tassels on the left. Traditionally, the moving of the tassel at graduation is called, turning the tassel or the turning of the tassel ceremony.. It symbolizes one's transition from candidate to graduate.
Bailey, D., Bailey, S. & Hufford, M. (1996) Copperheads Smell Like Cucumbers. [Audio] Retrieved from the Library of Congress, https://www.loc.gov/item/cmns001450/. Bailey, Dave, Sherman Bailey, and Mary Hufford.
the smell of copper was used to compare to the smell of blood. This strikes me as very odd, since iron is the heavy component of blood. I can understand calling the smell 'metallic' or comparing it to iron, but not copper.