12 
COMPUTATIONS OP Z. COLBURN, 
On numerical tiveness than if the principles were essentially different in all 
computations, t j ie various operations, 
particularly r 
those perform- The same letters shall be used in all the calculations, that 
fourn^ s * mi ^ ar *ty th® 86 may be rendered more perceptible j and 
I shall, therefore, in multiplying four figures by four, employ 
only a single set. Those who wish to pursue the method more 
in detail, can readily change the letters of one line, and by 
that manner arrive at the desired variation of the rule. 
7054 multiplied by 7054 = 58,583,710. 
Produce the square of 4 = 
1 1 
Add twice 5X4 
411 
The square of 5 
2 9 
Twice 0X4 
717 
Twice 7x4 
03 
Twice 0X5 
0 0 
1213 
The square of 6 . . 
48 
Twice 7x5 
1118 
Twice 7x0 
84j 
9|5 
The square of 7 ........... 
58,583,710. 
Another 
