screw eye

Observe the time by the clock at which the star disappears behind the wire as seen through the center of the screw eye.

Bore a hole, and put the screw-eye in such a position that it will slide under the hook with a snap.

If the string comes off the upper spool, put a large screw-eye into the top piece and pass the string thru it.

The hook must be filed off enough, and slanting, so that the screw-eye in the rider will slide under it and be caught.

If not put in high enough, it causes a rather too acute angle where the screw-eye is inserted and the limb is likely to break.