9. Types of Specific Gravity, 



In the following Summary (10) under the column of weights, timbers are specified as light, medium, and heavy. 



These results were obtained by taking three specimens of Australian timbers, standard testing size, as types of 

 each class, and then comparing the data of exotic timbers of equal dimensions with these three, and thus in some degree, 

 a comparative weight classification was arrived at. The specimens were all well seasoned. 



TYPES OF EACH CLASS. 



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