42 
BULUETI2S 1216, U. S. DEPAKTMENT OF AGRICULTURE. 
METHOD OF SAMPLING AND TESTS OF WOOD BLOCK. 
1. Sampling. — Ten blocks shall be taken as a sample. 
2. Measurement and weight. — Each block is measured for 
length, breadth, and thickness, and the total volume in cubic 
inches of the 10 blocks is computed. The whole number of blocks 
are weighed to the nearest gram <»r one-eighth ounce and the 
weight in pounds per cubic fool of ihe block is calculated 
3x4x8* BLOCK 
4"x4"x8"BL0CK 
Pig. 1. Method of boring wood blocks for sample. Borings made in 
cud grain with i-lnch bit or drill. Three borings on center line made 
half way through block : other borings through block. 
ANALYSES. 
3. The sample f<»r analyses shall he obtained by boring into 
the end grain of all the blocks, according to Figure 1. 
Moisture. 4. Moisture. — Take 25 grams of borings and place in a 250 cubic 
centimeter Erlenmeyer flask and pour on about 75 to 100 cubic 
centimeters of water-saturated xylol. Conned the Hash to a 
condenser with a short tube and distill off the xylol rapidly. 
continuing the distillation to near dryness, collecting the distillate 
