541 TABLE XLL NUMBER OF BRICKS IK A BUILDING. 



T? ricks. 

 To reduce the feet to square yards, divide them by 9)3024 



Square yards 2J bricks thick, . . 336 



"Which multiply by ..... 5 



And divide by ...... 3)1680 



Square yards standard thickness. . 600 

 Then to find the number of bricks in No. 3, under 



1| brick thick, opposite 100 yards, stands . . 12000 



"Winch to make 500, multiply by .... 5 



60000 



And opposite 60 yards stands .... 7200 

 Number of bricks required, . . 67200 



Or more shortly, by adding two cyphers to the number for 

 5 yards = 600, we get the number for 500 yards = 60000 

 And for 60 yards ...... 7200 



Number of bricks as above . . . 67200 



4. In a building containing 1296 cubic feet of brick- work, how 

 many square feet and square yards are there, standard thickness ? 

 Multiply the cubic feet ..... 1296 



By ......... 8 



And divide by ....... 9)10368 



Gives standard square feet; which, divided by . 9) 



Gives standard square yards, . . 128 



