308 
THE REV. W. WHEWELL ON TIDE OBSERVATIONS 
LUNITIDAL INTERVALS. JUNE 1835. 
Table I. 
Coast of North America. 
Least 
Interval. 
Greatest 
Interval. 
Differ- 
ence. 
Reduc- 
tion. 
Corrected 
establish- 
ment. 
Long. 
W. 
Corr.Estab. 
Greenwich 
Time. 
Cotidal 
Hour. 
h m 
h m 
m 
m 
h m 
h m 
h m 
h m 
c b Thomson’s Island. KeyWestT 
9 15 
10 45 
90 
38 
9 53 
5 57 
3 50 
3 30 
Florida J 
b St. Augustine 
7 35 
8 45 
70 
29 
8 4 
5 26 
1 30 
1 14 
a Savannah 
7 38 
8 53 
75 
31 
8 9 
5 24 
1 33 
1 17 
b Charlestown 
6 57 
7 57 
60 
24 
7 21 
5 20 
0 41 
0 26 
a Cape Fear River .......... 
6 47 
7 54 
67 
27 
7 14 
5 12 
0 26 
0 12 
c Cape Hatteras 
4 55 
6 45 
110 
48 
5 43 
5 4 
10 47 
10 36 
c c Gosport. Virginia Navy Yard 
8 15 
10 0 
105 
45 
9 0 
5 8 
2 8 
1 50 
b Delaware Breakwater 
7 7 
8 15 
68 
28 
7 35 
5 0 
0 35 
0 20 
b Sandy Hook 
7 5 
8 18 
73 
30 
7 35 
5 0 
0 35 
0 20 
c b Old Point Comfort 
7 50 
9 19 
89 
37 
8 27 
5 0 
1 27 
1 10 
a New York 
8 8 
9 18 
70 
29 
8 37 
4 56 
1 33 
1 16 
b New r port 
7 17 
8 13 
56 
22 
7 39 
4 45 
0 24 
0 9 
b Warren 
7 35 
8 48 
73 
30 
8 5 
4 36 
0 41 
0 25 
c b Gardiner’s Bay 
9 17 
10 48 
91 
38 
9 55 
4 37? 
2 32 
2 12 
c a Cape Cod ................ 
10 50 
12 15 
85 
35 
11 25 
4 38 
4 3 
3 40 
a Province Town 
10 55 
12 12 
77 
32 
11 27 
a Boston 
11 0 
12 15 
75 
31 
11 31 
4 43 
4 14 
3 51 
c a Portland 
10 35 
12 0 
85 
35 
11 10 
4 40 
3 50 
3 28 
c a Mount Desert Island 
10 35 
12 0 
85 
35 
11 10 
4 32 
3 42 
3 20 
a Portsmouth 
11 0 
12 13 
73 
30 
11 30 
4 44 
4 14 
3 51 
a Gloucester 
11 35 
12 35 
60 
24 
11 59 
a E. Port Maine 
10 40 
12 0 
180 
33 
11 13 
b Nantucket 
12 8 
13 26 
78 
33 
12 31 
4 40 
5 11 
4 46 
At the places marked a the curves are regular hut very flat. At those marked b the curves are more broken 
from tide to tide, hut the general course tolerably regular. At Cape Hatteras a sudden increase of the interval 
after June 18. At Newport, Warren, Gardiner’s Bay, Gosport, an increase of the interval June 21 p.m. 
The reduction made by subtracting 6 m from the mean, except at the places marked c, where 7 m is subtracted. 
Key West, Florida has a diurnal inequality, which at its maximum (June 9 and 24) amounts to 2|'‘. 
Nantucket has a tide-hour much later than the surrounding seas. 
I add here the following observations which I have received from Sir John Her- 
schel, made by him and Mr. Maclear. 
Cape of Good Hope. 
Least 
Interval. 
Greatest 
Interval. 
Differ- 
ence. 
Reduc- 
tion. 
Corrected 
establish- 
ment. 
Long. 
E. 
Corr.Estab. 
Greenwich 
Time. 
Cotidal 
Hour. 
h m 
h m 
m 
m 
h m 
h m 
h m 
h m 
Simon’s Bay 
1 50 
4 0 
130 
58 
2 48 
1 20 
1 28 
1 22 
Table Bay 
1 25 
3 48 
143 
64 
2 29 
1 20 
1 9 
1 6 
