[ 457 ] 
5- If as in the common logarithms 
of Briggs’s form, 
Then a will be found to be 2,302585092994, &c. 
And/— .... 0,43429448190325, &c. 
If I =y, the form will be that of Napier’s lo- 
garithms. 
6. Let B, 6, be the logs of the numbers a:, ia 
the form /=— , 
a 
And N, N, the logs of the fame numbers, in the 
form (b~—, 
» 
Then B?=N/; Ba=Na; BI^=NBj 
For B:N::(/x-:?X :: B: N:: 5 ;i:: B:N. 
If ;c = 10 5 B — 1 j rr: 2,30258, &C. | 
or / — 0,43429, &c. j a = <p = I . 
Then N == B x — = 2,30258, &c. 
=: B X j = 2,30258, &c. X B. 
6 = X = 0,43429, &c. X 
VoL. LXI. 
N n n 
7, Putting 
