TIMBER NOTES 227 



Multiplication hy Sliding Rule. 



Set 1 upon A to the multiplier upon B, then against 



the multiplicand upon A will be found the product 



upon B. 



Example: Product of 24 x 12. 



As 1 on ^ : 12 on B : : 24 on ^=288 on B (answer). 



Division. 



Set the divisor on A to 1 upon B, then against the 

 dividend on A is the quotient on B. 



Example: 432-5-12. 



As 12 on ^ : 1 on B : : 432 on ^ : 36 on J5=answer. 



To Square a Number. 



Set 1 upon D to 1 on C, then against the number upon 

 D will be found the square upon C. 



Example: Square of 25. 



As 1 on D : 1 on C : : 25 on D : 625 on C=answer. 



To Extract the Square Root of any Number. 



Set 1 on C to 1 on D, then against the number on C 

 is the root on D. 



Example: Square root of 144. 



As 1 on C : 1 on D : : 144 on C : 12 on Z)=answer. 



