Diagram of specific gravity apparatus TABLES I.Comparative strength of iron, steel, and wood II.

Ratio of strength of wood in tension and in compression III.

Right-angled tensile strength of small clear pieces of 25 woods in green condition IV.

Results of compression tests across the grain on 51 woods in green condition, and comparison with white oak V.Relation of fibre stress at elastic limit in bending to the crushing strength of blocks cut therefrom in pounds per square inch VI.

Results of endwise compression tests on small clear pieces of 40 woods in green condition VII.