As many scientific experiments have been made in Europe on woods which are, in their general properties and strength, nearly identical with those in common use in America, a brief synopsis of these will be given, that the carpenter may avail himself of the experiments by applying the results to our corresponding timber.

Acacia (Robina), - a wood commonly known in America as locust. A cubic foot, when seasoned, weighs forty-eight pounds. It is slightly stronger than oak.

Christiana Deal (Pinus abies), - a wood nearly allied to the spruce of North America. It is somewhat heavier and tougher. It will bear one-fifth more strain, and is also one-fifth stiffen

Cowrie (Dammara australis), - a New-Zealand tree, the wood of which answers well to the pitch or yellow pine growing in the New-England States. A cubic foot, when seasoned, weighs forty pounds. Its general strength is that of our spruce.

Dantzic Oak is of the same stiffness as our white oak, but is tougher and stronger.

English Oak (Quercus robur) is one-tenth lighter, and one-seventh stronger, than our white oak; and, while it is one-fourth tougher, it is not as stiff by one-seventh.

Mar-Forest Fir (Pinus sylvestris), - a wood which, in New England, would be considered as a cross between spruce and northern pitch-pine. A cubic foot, when dry, weighs thirty-eight pounds. It is of the same tensile strength as our spruce, but less elastic.

Memel Fir, - a wood nearly identical with that from Mar Forest. It answers well to the red and yellow pines of New England, but partakes of the nature of spruce, in being stiffer than the pines named.

Norway Spruce (Pinus abies) is, in many respects, like our black spruce. It is harder, and has more pitch. When seasoned, it weighs thirty-four pounds to a cubic foot.

Riga Oak is one-seventh stronger than our white oak, but is one-seventh less stiff. It is one of the toughest varieties of oak in use.

Scotch Fir is nearly identical with our New-England red and yellow pine.

Weymouth Pine (Pinus strobus) is a wood identical with the white pine of New England.