107 
Cases 82 and 83 and Walls.— Timber tests. Standards 
representing the results of strain upon various species of Ameri- 
can timbers. 
Between Cases 83 and 84 may be seen the two broadest 
boards ever sawn, both being specimens of the sugar pine of Cali- 
fornia. Here also are exhibited several fine examples of plain and 
curly yellow poplar from Kentucky. 
Between Cases 84 and 85 various species of trees from 
Kentucky, Washington, Oregon, and California may be seen. Not- 
able among these are particularly large sections of madrona, 
beech, pecan, and sweet gum. 
Between Cases 85 and 86 are several excellent specimens 
of the commercial woods of Canada, notable among them the 
paper birch. 
Between Cases 86 and 87, British Columbia woods, repre- 
sented by several especially fine sections. Beyond Case 87, at the 
end of the Section, may be seen four excellent examples of the 
principal timber trees of Alaska. 
