TABLE XL1. NUMBER OP BRICKS IN A BUILDIXG. 543 



allowance for mortar, 1 4 inches thick is the standard thickness 

 for brick-work ; and buildings which are over or under this thick- 

 ness, must be reduced to the standard before computing the price. 

 To reduce brick- work to standard thickness, multiply the super- 

 ficial content of the building, by the number of half bricks in" the 

 thickness, and divide by 3, the quotient is the content, standard 

 thickness. Thus, to reduce works of 2 bricks thick to standard, 

 multiply by 4 and divide by 3 ; and to reduce work of 2 J bricks 

 thick to standard, multiply by 5 and divide by 3. A rod of 

 brick-work, standard thickness, contains 306 cubic feet ; and to 

 reduce a measurement given in cubic feet, to standard thickness, 

 multiply the number of cubic feet by 8 and divide by 9 the quo- 

 tient is superficial feet standard thickness, which divide by 9, to 

 reduce to square yards, if desired, or refer to Table XL. 



EXAMPLES. 



1. What number of bricks, of each of the three sizes, will be 

 required to build a wall one brick thick, and measuring 2 Scotch 

 roods, 23 yards ? 



On referring to Table No. 1, under 1 brick thick, Bricks. 



opposite 2 roods or 72 yards, stands . . 7200 



And opposite 23 yards stands . . . . 2300 



Number of bricks, standard size, . . 9500 



In Table No. 2, under 1 brick thick, opposite 72 



yards, stands 6480 



And opposite 23 yards stands . 2070 



Number of bricks, medium size, . 8550 



In Table No. 3, under 1 brick thick, opposite 72 



yards, stands , 5760 



And opposite 23 yards stands . . . 1840 



Number of bricks, largest size, . . 7600 



2. What number of bricks, of the medium size, will be required 

 for a wall measuring 121 square yards, standard thickness? 



In Table No. 2, opposite 100 yards, under 1J brick Bricks. 



thick, stands 13500 



And opposite 21 yards stands .... 2835 



Number of bricks required, . , 16335 



3. How many square yards, standard thickness, are in a 

 building 2 J brick thick, and measuring 3024 square feet ; also, the 

 number of bricks, of the largest size, required for its formation ? 



