The Golf Factory Chapter Ten
Homer Kelley's "The Golfing Machine"

The Spine

Chapter # Ten - The Spine

The Spine is straight at address and remains straight thoughout the swing.
The Spine angle formed at address is maintained throughtout the swing. During the follow through the spine does straighten as the weight stiffs to the left foot.
The Spine does not tilt toward or away from the target or the ground.

Homer Keley The Golfing Machine
Howard McMeekin, PGA Life Member

The role of the spine is examined in chapter ten of the Golf Factory.