The first drop will be 1 inch and the increase will be by increments of 1 inch till a height of 10 inches is reached, after which increments of 2 inches will be used until complete failure occurs or 6-inch deflection is secured.
A 50-pound hammer will be used when with drops up to 68 inches it is practically certain that it will produce complete failure or 6-inch deflection in the case of all specimens of a species.
For all other species, a 100-pound hammer will be used.
In all cases drum records will be made until first failure.

Also the height of drop causing complete failure or 6-inch deflection will be noted.
_Compression parallel to grain_: This test will be on specimens 2" X 2" X 8" in size.

On 20 per cent of these tests load-compression curves for a 6-inch centrally located gauge length will be taken.

Readings will be continued until the elastic limit is well passed.

The other 80 per cent of the tests will be made for the purpose of obtaining the maximum load only.
_Compression perpendicular to grain_: This test will be on specimens 2" X 2" X 6" in size.