OCR Text |
Show DYNAMITE OUT THE STUMPS Result Given of Experiment Made by Kentucky Agricultural Station Cost of Material. Over 100 stumps having an average diameter of 16 inches were blown in Kentucky agricultural experiments at London. The average number of sticks of dynamite used was 2.6, the average time required per stump 30 minutes, the average cost of material 23.7 cents, and the average total cost per stump 33 cents. Nearly all the stumps were dead oak. At the experiment experi-ment station farm at Lexington nine green stumps averaging" 22 inches in diameter were blown at an average cost of 1.56 per stump, 10 1-3 sticks cf dynamite per stump being used. Of these stumps three black oak averaged 45 inches in diameter, and were blown at ' a total cost of $3.52 per stump, the average number num-ber of sticks of dynamite used being 23 1-3. The amount of dynamite required to blow stumps of the same kind in the same soil does not vary directly with the diameter, but more nearly with the square of the diameter; or, in other words, with the area of a cross section of a stump. ' |