This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
There is another form of decay which affects wood in a manner somewhat similar to dry rot, but which takes place in the growing tree. It is known as "wet rot" and is caused by the wood becoming saturated with water which it may absorb from a swamp or bog. Wet rot may be readily communicated from one piece of wood to another by contact so that it is apt to spread rapidly.