While the [[cards:fusion|effect of fusing two cards into one]] is better known, magicians have been fusing other objects for even longer. Dan Danielien proposed fusing two coins by slowly sliding a shell over a coin, publishing it in //[[https://askalexander.org/display/38288/The+Sphinx/8|The Sphinx]]//, Vol. 43 No. 9, Nov. 1944, p. 224. In the same description, Danielien also mentions using the same method and handling with billiard balls.