Failed at a group of knots 64" from end.

This post had groups of knots at intervals along its length of 18" to 24. The failure occurred at the third group from the end.

Post now sawed apart and a block (No. 516', 12" long) obtained free from knots, also a block (No. 5162, 12" long) containing a group of knots. Their ultimate compression strength obtained as below.

Blocks tested seven days after original test.

Block No. 516' (free from knots): Ultimate strength, 101,900 pounds 3,420 pounds per square inch.

Block No. 5162 (contains seven knots from " to 1" diameter): Ultimate strength, 89,500 pounds = 3,003 pounds per square inch.

Failed at a group of knots 66" from end, deflecting sideways and upward.

Gauged length, 1007.

Weight, 90 pounds.

Counterweight at middle, 45 pounds.

Initial bend before dressing down from size, 6" x 6": Horizontal, +".25.

Failed by deflecting upward and sideways.

Fibers crushing at some knots 14" from end A, and at some knots 24" from end B.

No. 515.

"25 C

."38x

180,"28

Sectional area, 28.4 square inches.

Gauged length, 100".

Weight, 91 pounds.

Counterweight at middle, 45 pounds.

Initial bend in post before dressing down from size 6"x6": Hori zontal, ".38; vertical,

".25.

Sectional area, 28.6 square inches.

Weight, 96 pounds.

Counterweight at middle, 48 pounds.

Initial bends in stick before dressing down from size 6"x6": Hori zontal, +".43; vertical, +".25.

Deflected sideways and downward.

Crushed fibers in vicinity of small knots (" diameter) at middle.

No. 522.

7430

210.25

Sectional area, 29 square inches.

Weight, 101 pounds.

Counterweight at middle, 50 pounds.

Initial deflection in stick before dressing down from size 6"×6′′: Horizontal, + ".43.