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SPECIFIC GRAVITY 
-The relation between bending strength and specific gravity for 115 hardwoods and 48 softwoods. Each point represents the average of a number of tests, 
up to several hundred for the more important species, on small, clear, straight-grained specimens. The specific gravity values are calculated from the weight of 
the wood when oven dry and its volume at test 
2 M 27311 F 
