"tramble" is a word

Though "tramble" is indeed a word in the English language (circa 1913), it'd be hard to fit it into a common conversation, such as, "Oh, I was just trambling in the back yard yesterday."

It means:
To wash, as tin ore, with a shovel in a frame fitted for the purpose.

(So I wonder: can "tramble" be applied to other ores, or only cassiterite?)