Conduit
A conduit is an arrangement of still lifes and/or oscillators that move an active object to another location without themselves being permanently damaged. The object may be transformed into a different active object in the process, but no permanent debris may be left behind (except perhaps gliders or other spaceships). Probably the most important conduit is conduit 1, in which a B-heptomino is transformed into a Herschel in 59 generations.
External links
Conduit at the Life Lexicon