A searchlight was on a tripod at the center, and a spool of electric cable.
Guide it to its place with the thumb, and run it from side to side of the reel like cotton on a spool.
Oh, look at the kitten chasing the spool, all in electric lights!
Put a spool over the nail which was your fulcrum in the first two experiments.
Pass the string through the handle of the pail and ...