222
WU X The logs of wood are kept completely immersed in running stream of water,
with their larger ends pointing upstream. Consequently the sap, sugar, and gum are leached
out and are replaced by water. The logs are then kept out in air to dry. It is a quick process but
the elastic properties and strength of the wood are reduced.
f in water or exposing the wood to the action of steam spray is a very quick but expensive
process of seasoning.
u is adopted for rapid seasoning of timber on large scale to any moisture content.
The scantlings are arranged for free circulation of heated air with some moisture or superheated
steam. The circulating air takes up moisture required from wood and seasons it. Two types of
kilns, the progressive (Fig. 4.3 (a)) and the compartment (Fig. 4.3 (b)) are in use. For most
p
2R
Q@A
'2u
p
2R
Q@A g")"2u