Hickory may also be used for the center section and filler plate in lam- 

 inated skis. For this purpose the weight must be not less than 40 pounds per 

 cubic foot at 12 percent moisture content, and the slope of the grain must not 

 exceed 1 in 10 on any face. Wood shall be free of decay, splits, bark pockets, 

 and unsound knots. Other defects will be limited as follows: 



1. Sound tight knots not exceeding one-fourth inch in average 

 diameter and located at least 6 inches apart. 



2. Holes not exceeding one- sixteenth inch in diameter and at 

 least 2 inches apart. Holes shall not appear on exposed 

 edges. 



3. Surface checks and shakes shall be limited to barely 

 perceptible openings, not over 4 inches long and not 

 appearing on exposed edges. 



4. Sound mineral streaks will be permitted. Patching of 

 defects in the center section with wood patches will be 

 permitted, providing each patch is not less than 4 times 

 as long as its greatest cross sectional dimensions and 

 providing the ends of each patch are scarfed at a slope not 

 exceeding 1 in 10. All joints of patches shall be tight and 

 shall comply to the requirements for laminated joints of 

 this specification. Patching shall be done before the center 

 section is glued together. 



Hickory Poles and Bark 



Manufacturers of rustic furniture purchase hickory poles and, in some 

 cases, bark as raw materials. Small poles suitable for rungs are 3/4 to 1 

 inch in diameter. Larger poles, from Ij to 4 inches in top diameter, are 

 used for posts in the furniture. Lengths accepted vary from a minimum of 

 20 inches for rung stock at one plant to 10^ feet maximum at another. The 

 poles must be cut during the winter so that the bark will remain tight. They 

 are bought by the piece. 



Bark of pignut (black) hickory is purchased by the hundred square feet 

 of surface measure. In making strips for furniture seats and backs the bark 

 is split, hence higher yields are realized from thick bark. The grade and 

 price paid are higher, therefore, when the bark is thick. Bark is delivered 

 and stored in rolls (fig. 2). 



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