MEASURING HAY IN RICKS OE STACKS. 23 



need no further explanation. The use of these formidas will be mdi- 

 cated below. 



The formula for drawing No. 5 in figure 2 (F=U.08 ECc) means 

 that the volume of the lower part (from the shoulder, or bulge, down) 

 of a round stack shaped hke the drawing is equal to 0.08 multiplied 

 by the height of the base, this total multiplied by the circumference 

 at the top of the base, and the product then multiplied by the cir- 

 cumference at the bottom of the stack. 



In determining the volume of the tops of stacks it will be noticed 

 that the decimal precedmg the E in each of the formulas varies with 

 the shape of the top. In order to use this formula in any given case, 

 it will be necessary to determine by inspection what decimal to use. 

 It will lie somewhere between 0.027 and 0.053. In measuring the 

 volume of the base of the stack no such uncertainty exists, since the 

 decunal in the formula is the same m all cases. 



A few examples will illustrate the use of these formulas. 



Example 1. — The base of a haystack is cylindrical and the top conical. The height 

 of the base is 4 feet and the height of the top is 6 feet, the circumference of the stack 

 at the ground and at the shoulder being 28 feet. What is the volume of the stack in 

 cubic feet? 



Solution: 



Top of haystack F=0.027X6X282=127.0 cubic feet. 



Bottom of haystack F=0.08 X4X282=250.9 cubic feet. 



Total 377.9 cubic feet. 



Example 2. — A haystack has a top similar in shape to outline No. 2 in figure 2 and 

 the base of the shape of outline No. 5 in figure 2. The height of the top is 5 feet, 

 the circumference at the bulge is 26 feet, the height of the base is 3J feet, and the 

 circumference at the bottom of the stack is 20 feet. What is the volume of the stack 

 in cubic feet? 



Solution: 



Top of haystack T =0.04X5 X262 = 95.2 cubic feet. 



Bottom of haystack 1=0.08X3^X26X20= 89.6 cubic feet. 



Total 184.8 cubic feet. 



MEASURING THE HEIGHT OF HAYSTACKS. 



The formula given for determining the number of cubic feet in a 

 stack of hay involves the height of the stack, which it is necessary 

 to measure in some manner. It is also desirable sometimes to 

 measure the height of a rick. . Figure 3 shows a simple method of 

 accomplishing this. In using this method two points are marked 

 on the ground on opposite sides of the rick or stack and at as nearly 

 equal distances from its center as possible. A cord is then thrown 



ICir. 131] 



