TABLE XXIX. CAPACITY OP TANKS IN IMPERIAL GALLONS. 455 



If it be desired to make an oblong tank to contain about the. 

 same quantity, the depth to be 8 feet, and the breadth 9 feet, 

 what must be" its length? 



In Table XXVI., at a breadth of 9 feet, under a 



depth (height) of 8 feet, we find opposite a Yds Ft. 



length of 13 feet, stands 34 18 



And opposite J foot stands ... . 19 



Or, a tank 13 J feet long, 9 broad, and 8 deep, will 



measure . 36 



and will contain 6058 gallons. 



An Imperial gallon contains 277.274 cubic inches, and if 

 46,656, the cubic inches in a yard, is divided by that number, 

 the quotient is 168.26677, or a little more than 168J gallons^per 

 cubic yard; and this number, divided by 27, the cubic feet in a 

 yard, gives a quotient of 6.2321, or a little less than 6J gallons 

 per cubic foot. 



Thus, if the cubic content of any tank is known, yards multi- 

 plied by 168.26677, and feet multiplied by 6.2321, will give its 

 capacity in Imperial gallons. Where great exactness is not re- 

 quired, the yards may be multiplied by 168J, and the feet by 6J 

 in place of the above. 



Suppose the solid content of a tank to be 36 yards 10 feet ; 



Gallons. 



Then, 36 X 168.26677 = 6057.60372 



And, 10 X 6.2321 62.321 



Capacity of the tank, 6119.92472 



or very nearly 6120 gallons, as shown by the Table. 



Rules for calculating the capacity of tanks in Imperial gallons. 



1. For circular tanks. Given, the diameter and depth. 

 Square the diameter, multiply the product by the depth, and 



by 4.8947, if the dimensions are given in feet; or, by .0028326, 

 if the dimensions are given in inches. 



2. For circular tanks. Given, the circumference and depth. 

 Square the circumference, multiply the product by the depth, 



and by .49594, if the dimensions are given in feet ; or, by .000287, 

 if the dimensions are given in inches. 



3. For square or oblong tanks. Given, the length, width, and 

 depth. 



Multiply the length, width, and depth into one another, and 

 the product by 6.2321, if the dimensions are given in feet; or, 

 | by .00360654,"if the dimensions are given in inches. 



We shall perform the foregoing examples, by the Rules, in 

 their order. 



