MR. LUBBOCK ON THE TIDES 
257 
Table XXVIII. 
Showing- a Comparison between the Semimenstrual Correction at London in the 
Interval and in the Height, as deduced from theory and observation. See 
Plate XVIII. 
Moon’s 
Transit. 
Interval. 
+ constant. 
Height. 
h. 
Theory. 
Observation. 
Theory. 
Observation. 
h m 
h m 
h m 
feet. 
feet. 
0 0 
3 13-5 
2276 
0 30 
3 5-3 
3 57 
2277 
22-80 
1 0 
2 57-0 
2270 
1 30 
2 49-5 
2 49-6 
22-58 
22-66 
2 0 
2 41-3 
22-35 
2 30 
2 35 0 
2 35 1 
22-09 
21-94 
3 0 
2 29-0 
2173 
3 30 
2 25 0 
2 25-1 
21-35 
21-16 
4 0 
2 23 0 
20-90 
4 30 
2 21-5 
2 21-4 
20-47 
20-17 
5 0 
2 28-0 
20-10 
5 30 
2 36-0 
2 33-9 
19-75 
19-49 
6 0 
2 51-0 
19-58 
6 30 
3 9-0 
3 8-8 
19-47 
19-44 
7 0 
3 24-0 
19-64 
7 30 
3 41-0 
3 39-8 
19-85 
20-22 
8 0 
3 47-0 
20-25 
8 30 
3 52-0 
3 52-0 
20-63 
21-14 
9 0 
3 50 0 
21-10 
9 30 
3 48-0 
3 48-9 
21-50 
21-94 
10 0 
3 43 0 
21-89 
10 30 
3 37-0 
3 37-2 
22-22 
22-46 
11 0 
3 29 0 
22-47 
11 30 
3 22 0 
3 221 
22-66 
2277 
The argument in the preceding Table is the apparent solar time of the Moon’s 
transit two days previous to the tide required. The constants employed in the cal- 
culation are 
log (A) = 9*5841774 D = 16’69 log (E) = 0*6468993. 
See p. 224. 
Table XXIX. 
Showing the Calendar-month Inequality, as deduced from Bernoulli’s theory and 
from observation. See Plate XIX. 
Moon’s 
Transit. 
January. 
February. 
March. 
Moon’s 
Transit. 
d 
d h 
Moon’s 
Decli- 
nation. 
d -i 
d h 
Moon’s 
Decli- 
nation. 
d ^ 
d li 
Moon’s 
Decli- 
nation. 
Theory. 
Obser- 
vation. 
Theory. 
Obser- 
vation. 
Theory. 
Obser- 
vation. 
Theory. 
Obser- 
vation. 
Theory. 
Obser- 
vation* 
Theory. 
Obser- 
vation. 
h m 
m 
m 
feet. 
feet. 
m 
m 
feet. 
feet. 
m 
m 
feet. 
feet. 
o 
h m 
0 30 
0 
- 2 
-•49 
-•10 
19 
0 
- 3 
+•08 
+•21 
10 
0 
0 
+•32 
+•07 
5 
0 30 
1 30 
0 
- 3 
-•36 
-•ii 
16 
- 2 
- 1 
+•16 
+•04 
6 
- i 
0 
+•25 
+•08 
8 
1 30 
2 30 
+ 2 
+ 2 
-•13 
-•01 
11 
+ 1 
+ 1 
+•16 
+•14 
5 
0 
- 1 
+•10 
-•08 
13 
2 30 
3 30 
+ 4 
+ 4 
+■03 
+•25 
6 
0 
- 1 
+•10 
+•20 
8 
- 3 
- 4 
-•11 
-•19 
17 
3 30 
4 30 
+ 3 
+ 6 
+•10 
+•28 
5 
- 3 
- 1 
-•09 
+•03 
14 
- 9 
- 7 
-•36 
-•39 
23 
4 30 
5 30 
+ 3 
+10 
+•08 
+•02 
9 
- 4 
- 2 
-•28 
-•35 
18 
- 6 
- 9 
-•49 
-•52 
22 
5 30 
6 30 
0 
+ 1 
+•01 
+•15 
13 
0 
- 2 
-•45 
-•36 
21 
0 
0 
-•58 
-•44 
23 
6 30 
7 30 
0 
0 
-•24 
-•03 
18 
+ 7 
0 
-•54 
-•22 
23 
+ 6 
+ 6 
-•49 
-•29 
22 
7 30 
8 30 
+ 4 
- 2 
-•43 
-•01 
21 
+ 7 
+ 3 
-•47 
-•26 
22 
+ 6 
+ 6 
-•26 
-•19 
19 
8 30 
9 30 
+ 3 
+ 1 
-•53 
-•24 
23 
+ 4 
0 
-•45 
-•19 
22 
+ 2 
0 
-•06 
-•08 
16 
9 30 
10 30 
+ 2 
- 2 
-•66 
-•25 
23 
+ 2 
- 2 
-•29 
-•03 
19 
0 
- 2 
+•16 
•00 
11 
10 30 
11 30 
+ 1 
- 4 
-•60 
-•19 
21 
+ 2 
- 4 
-•07 
+•09 
14 
+ 1 
- 1 
+•29 
+•19 
6 
11 30 
Sun’ 
s Decl. 
21°, and Par. 8"-94. 
Sun’s Decl. 13°, and Par. 8"-90. 
Sun’s Decl. 3°, and Par. 8"-84. 
2 L 
MDCCCXXXVI 
