COCONUT PLANTER'S MANUAL, 1(51 



USEFUL FACTS AND FIGURES. 



Methods op Reckoning the Area of Lands. 



a. Divide the land into as many triangles as possible (the length of the 

 base into the altitude divided by 2 is the area of a triangle) and add the 

 areas of the triangles. 



b. To find the area where the boundaries are very irregular. Lay out 

 a base line and at right angles from the base measure offsets to the various 

 bends and angles of the opposite boundaries. The land is then divided into 

 approximate triangles, trapezoids, rectangles and probably squares. Add the 

 areas of these spaces together ; the sum will be the area of the land. 



N. B, — Area of triangle = length of base x altitude 2. 



Area of a trapezoid = Average length of the two side x base. 

 Area of a rectangle = length x breadth. 

 Area of a square = length of a side x itself. 



In the computation of acreage the easiest measurement will be links. 



N. B.— Link = 7'92 inches. 

 Chain = 100 links. 

 Acre = 100,000 square links. 



To reduce square links to acres point off 5 figures to the right, that is, 

 divide by 100,000, the result is acres and a fraction in decimals. Multiply 

 the decimals by 4 and point off 5 place? again, which gives rood and a 

 fraction in decimals. Multiply the decimal by 40 and mirk off 5 figures, 

 then we get poles — 



e. g. 1234567 sqr. links. 



= 12-34567 acres. 

 = •34567 x 4 roods, 

 = 1-38268 



= -38268 x 40 poles. 

 = 14-30720 „ 

 = 12>cres 1 rood 14*30720 poles. 

 R 



