CHAPTER XVII. 



RULES AND MEASURES. 



To measure wood. INIultiply together the length, 

 width, and height in feet and divide the product by 128. 

 The result is the number of cords. 



802. How many cords in a pile of wood 30 feet long, 

 4 feet wide, and 8 feet high ? 



803. How many cords in a pile of wood 84 feet long, 

 10 feet wide, and 6 feet and 4 inches high? 



To ascertain the circumference of a tree required to 

 hew a square stick. Multiply _tlie given side of the 

 square by 4.44, i. e., by 3.1416 \^. The quotient is the 

 circumference required. To find the diameter multiply 

 the given side by 1.414. Allowance, of course, must be 

 made for the tapering, irregularities, and bark. 



804. A farmer needs a timber 9 inches square. A tree 

 of what circumference in the clear will furnish it? 



Process: 9X4.44 = 40 Inches in circumference. 



805. He also needs a timber 12 inches square. What 

 is the circumference required? 



806. A tree of what circumference will furnish a 

 piece of timber 14 inches square? 



To determine the height of a tree. The easiest 

 method to determine the height of a tree is to remember 

 that when the length of the shadow of a vertical pole is 

 equal to the length of the pole, the length of the shadow 

 of a tree is equal to the height of the tree, or that in gen- 

 eral the height of a tree is in the same ratio to the length 



220 



