Professor Butts' "Self-Operating Napkin" is set in motion when soup spoon (A) is raised to mouth and pulls string (B), jerking ladle (C) which throws cracker (D) past parrot (E). When parrot jumps after cracker, perch (F) tilts, tossing seeds (G) into pail (H). Extra weight in pail pulls cord (I), which opens and turns on cigar lighter (J), setting off skyrocket (K) which causes sickle (L) to cut string (M), making pendulum with attached napkin swing back and forth, thereby wiping chin. Substitution of harmonica for napkin creates after-dinner entertainment.

is the editor of Against the Grain: Mad Artist Wallace Wood (2003), reviewed by Paul Gravett.