THE RIVER THAMES AT LONDON BRIDGE AND THE SEA. 
177 
Mean high water spring tide for 1827, 26.475 Low water 8.700 Mean 17.587 
Do. . . . do. . . . 
1828, 26.50 . 
do. . 
8.61 
do. 
17.55 
Do. . . . do. . . . 
1829, 26.09 . 
do. . 
8.93 
do. 
17.51 
Means 
. . 26.355 . 
do. . 
8.74 
do. 
17.549 
High water neap tides . . . 
1827, 22.56 . 
do. . 
11.12 
do. 
16.84 
Do. . . . do. . . . 
1828, 22.69 . 
do. . 
11.44 
do. 
17.06 
Do. . . . do. . . 
1829, 22.72 . 
do. . 
11.45 
do. 
17.08 
Means 
. . 22.656 . 
do. . 
11.336 
do. 
16.993 
Mean for the three years. 
> 
Spring tide high water, 26.355 
Spring low . 
8.74 
Mean level 17-549 
Neap tide do. . . 22.656 
Neap low . 
11.336 
. do. . 
16.993 
Means . . 24.50 
10.03 
17.27 
As there are many blanks in the three years observations that these were 
taken from, I have also selected the most perfect year (1827), and taken the 
mean of all the tides for each month in the year. 
The following is the 
Summary. 
January, 
Mean high water 
24.78 
February" 
. . do. . . 
24.08 
March . 
. . do. . . 
24.70 
April . . 
. . do. . . 
24.25 
May . . 
. . do. . . 
24.35 
June . . 
. . do. . . 
24.31 
July . . 
. . do. . . 
24.39 
August . 
. . do. . . 
24.39 
September 
. . do. . . 
24.29 
October 
. . do. . . 
24.79 
November 
. . do. . . 
24.65 
December 
. . do. . . 
24.53 
Means . . 
24.46 
Mean low 
10.20 
Mean level 
17.49 
. do. . 
10.00 
. do. . 
17-04 
. do. . 
9.60 
. do. . 
17.15 
. do. . 
9.90 
. do. . 
17.07 
. do. . 
10.35 
. do. . 
17.35 
. do. . 
10.29 
. do. . 
17.20 
. do. . 
10.16 
. do. . 
17.27 
. do. . 
10.26 
. do. . 
17-32 
. do. . 
10.00 
. do. . 
17.14 
. do. . 
9.66 
. do. . 
17.22 
. do. . 
9.90 
. do. . 
17.27 
. do. . 
9.62 
. do. . 
17.27 
9.995 
17.23 
A 
MDCCCXXXI. 
