The lining on a bowed stringed instrument is a bent piece of wood, usually willow or spruce, which is glued to the top and bottom of the ribs to reinforce the ribs and create a larger glueing surface for the plates. Here is a short video clip of the process.

Exceptional 3/4 Size Istvan Nemez (Stefan Nemes) Violin – Immaculate Condition, Big Warm Sound, Professional Setup
