33 .-- Endwise compression test, showing method of measuring the deformation by means of a compressometer.] _Preparing the material_: Two classes of specimens are commonly used, namely, (1) posts 24 inches in length, and (2) small clear blocks approximately 2" X 2" X 8".

The specimens are surfaced on all four sides and both ends squared smoothly and evenly.

They are carefully weighed, measured, rate of growth and proportion of late wood determined, as in bending tests.

After the test a moisture section is cut and weighed.

Ordinarily these specimens should be free from defects.
_Sketching_: Sketches are made of each end of the specimens to show the character of the growth.