112 REPORT— 1883. 
[R.] 
Form for Reduction of the Tide MSf. 
n 
+ —|+ —[+ —|+ —]+ -]+ -|+ -|+ -|+ -]+ -l 02 
cb) 
cee 
oF change 
1 
ae change 
<— 
— Ss 
2 Wi change 
is change 
— 
[ s 
— 
3 change 
Se 
change 
<— 
—-> 
<— 
change 
4 § 
pa change 
<— 
—> 
oh change 
5 
ae change 
. ool 
Total + 
Total — 
Total 
Multiply . 
Results 
Sum laterally . ; oa POLO ep . Sumof —= 
ch cos 2(¢ -y)'= 
aa 
