Excerpt from The Boy Mechanic, Volume 2, 1915.
Tight-fitting Can Covers
covers on lard and similar pails can be readily removed by tying
a stout cord loosely below the cover, then placing an ordinary
nail under the cord and twisting it. This will tighten the cord
around the can evenly, which will loosen the cover.
Editor's Note: This is a reprint of an article published
in 1915. It describes what was recommended in accordance with
the knowledge and practices of the day. While reading it, please
consider this fact.