. 113 



Another series of tests on the relative strength of oak and yellow pine 

 wagon poles is of interest, not only for the method of loading and measur- 

 ing the quality of the pole, but from the light it throws on the essential 

 difference between products from such woods as oak and such woods as 

 yellow pine. (Referring to the diagram, the method of loading and meas- 

 uring the various elements of the test were shown. The general results of 

 the investigation are also shown by the diagram and table, from which it 

 appears that while longleaf pine poles are as strong and elastic as the oak 

 poles, yet they lack the toughness, and the effect of a cross grain is much 

 more serious than in the case of oak.) 



1 hese various instances are brought forward to show the method of 

 attack and scientific care in aiding the solution of a large commercial 

 problem of this kind. The results of these tests will appear in a publica- 

 tion by the Forest Service. 



8— A. OF Science. 



