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.
This is a wood which is very much like spruce in structure, but is hard and very strong, resembling hard pine in this respect. The tree grows in the northern part of the United States and Canada, both in the East and in the West, and also in Europe. Its true name is larch, but it has come to be known as tamarack, tamarack pine, and hackmatack. In the East the tree grows in wet places called tamarack swamps, but the tree in the West and in Europe thrives best in dryer soil, and grows more quickly under these conditions than in a swamp. The wood is used mostly for long straight timbers such as posts, poles, and quite extensively for piles. It has also been used a great deal for railroad ties. It is supposed to be very durable, and is well suited for use as ties or as piles, but it can not always be obtained now. It has never been used to any extent as sawn lumber, because the demand for the trunks for use as posts and poles has been so great that it did not pay to saw them up.