Mr. Manning's new Method 
34 ° 
Example of the Method of Addition. To find the h. 1 . of 2 « 
1.1 
11 
1.21 
121 
TS31 
1 S3 I 
1.4641 
14641 
1.610,51 
1610 51 
1.77156T 
177156 
1 -94^7 1 7 
19487 
Continued. 
1.991863 
199^ 
i-993 8 55 
1994 
1-995849 
1996 
i-997 8 45 
1998 
1-999843 
199 
2.000042 
1.968204 
19682 
1.987886 
1988 
1.989874 
1989* 
1,991863 
From this operation it appears, that 
TO xH 1 ” X flF X Hiil‘ x = 2 - 000042 . 
Consequently, 7 x h.l. 4£ + 2 x h.I. + 6 x h.l. i||i + 
h - l T33§s = h - •• 2.000042. 
= h. 1. 2 -|- h. 1. 2 '°°° = h.l. 2 -(- h.l. ( 1.000021) = h.l. 2+ 
000021 . 
The method by subtraction has many advantages over this 
* Instead of this number 1989, it would be more correct to set down 1990, 
because the first figure of the neglected part, 874, exceeds 4. 
