4 BULLETIN" 884, U. S. DEPARTMENT OF AGRICULTURE. 
may vary from this figure, depending on the quality of the wood and 
the conditions in which it is placed. 
Sycamore does not impart odor or taste to substances in contact 
with it, nor does it stain them. This quality, together with its 
moderate degree of strength and the difficulty in splitting the wood, 
makes it particularly suitable for certain kinds of containers. 
Table 3. — Average computed weight (in pounds) of 
sycamore in different forms . 
1-inch 
lum- 
ber, 
per 
1.000 
feet, * 
b. m. 
Cord, 
90 
cubic 
feet 
(solid 
wood). 
Doyle log rule. 
Scribner log rule. 
Diameter of logs — inches. 
Diameter of logs— inches. 
- 
6 
12 
18 
24 
6 
12 18 
24 
1,000 feet, log scale. 1,000 feet log scale. 
4,300 
3,000 
4,700 
3,200 
55,600 
38,000 
12, 000 
8,200 
8,400 
5,700 
7,100 
4,800 
12,400 
8,400 
9,700 
6,600 
7,700 
5,300 
7,000 
Sycamore- air-dry 
4,800 
Table 3 gives the average computed weight of 1,000 board feet 
of 1-inch lumber, of a cord of wood, and of logs per 1,000 board 
feet as scaled by the Doyle and Scribner log rules. The cord used 
in this table is composed of 90 cubic feet of solid wood. The official 
standard weight of the National Hardwood Lumber Association for 
rough sycamore lumber 1 inch thick is 3,000 pounds per 1,000 board 
fe^t, which corresponds with the computed weight of 1-inch air-dry 
lumber as shown in the table. The standard weight of the Associa- 
tion for green sycamore lumber 1 inch is 4,750 pounds per 1,000 
board feet. 
STRUCTURE. 
Sycamore is a " diffuse porous" wood; that is, the pores or vessels 
of the wood are all nearly the same size and quite evenly distributed 
Beech ! Sycamore ! Birch 
Fig. 1.— Wood of beech, sycamore, and birch, a, broad ray of sycamore; c, d, narrow ray of beech and 
birch; ar, annual ring. 
throughout each annual layer or ring of growth, and the annual 
rings are marked off from each other by light-colored lines. The 
medullary rays are numerous and conspicuous and practically all 
