DENOMINATE NUMBERS 



1764 



DENOMINATE NUMBERS 



'Fig. 3 represents a square built on one yard; 

 'that is, a square yard, or nine square feet. 



Ift. 



Table of Surveyor's Linear Measure 



7.92 inches=l link (11.) 

 100 links =1 chain (ch.) 

 80 chains = 1 mile (mi.) 



Surveyor's Surface Measure 



625 square links (sq. li.) =1 square rod (sq. rd. ) 

 16 square rods =1 square chain (sq. ch.) 



10 square chains :=! acre (A.) 



640 acres (a section) =1 square mile (sq. mi.) 

 3 6 square miles =1 township ( Tp. ) 



The acre is not a square unit of measure as 

 the square inch, square foot and so on; the 

 name acre has been applied to a definite 

 amount of ground, namely, 160 square rods, 

 regardless of the shape of the piece of ground. 

 An acre may be 16 rods long and 10 rods wide, 

 or 8 rods by 20 rods, etc., as shown below 

 (Fig. 4), 



16 rods 

 FIG. 4 



Notice that there is no linear measure cor- 

 responding to acre. 



Table of Cubic Measure 



1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 

 27 cubic feet =1 cubic yard (cu. yd.) 



How many cubic-inch blocks can be laid on 

 one square foot of surface? (See Fig. 5.) 

 Count and see. The number is 144. How 



many layers, each containing 144 cubic-inch 

 blocks, can be piled up in a pile 12 inches 

 high? How many cubic inches in a cubic 

 foot? 



Examine Fig. 6. How many cubic-foot blocks 

 in the first layer? How many layers in the 

 cubic yard? How many cubic feet in a cubic 

 yard? 



Cubic Measures Used In Industries 



1 cubic yard =1 load 

 128 cubic feet =lcord 

 24% cubic feet 1 perch 



One load is the unit of measure for earth 

 removed in excavating. One cord is the unit 

 used in measuring fire wood; a pile of this 

 wood 8 feet by 4 feet by 4 feet is called a cord. 

 One cord foot is a pile 1 foot by 4 feet by 4 

 feet. One perch is the unit used in measuring 

 stone; it is 1 foot by 1*6 feet by 16% feet, or 

 contains 24% cubic feet. 



A 



bd.ft. 



I ft. 



FIG. 7 



Board Measure. One board foot is generally 

 the unit of measure for lumber, boards, tim- 



