In birds, this stalk consists entirely of blood-vessels, which in the adult enclose no terminal vesicle, and fuse with the membranous linings of the skull.
Sometimes linings of enamelled iron or other material are employed, which when worn can be replaced at a far lower cost than that of a new still.
For shaft linings steel rings of H or channel section supported by intermediate struts are also used, and cross-bearers or buntons of steel joists and rail guides are now generally substituted for wood.
The town formerly had a considerable manufacture of serges and shalloons, or light woollen linings, so called from Chalons-sur-Marne, France.
Slabs are also manufactured, and, being readily cut, planed, dressed and enamelled, are used for chimney pieces, billiard tables, wall linings, cisterns, paving, tomb-stones, ridge rolls, electrical switch-boards and various other architectural and industrial purposes.