Secondary Undulations of Oceanic Tides. 
113 
considered to correspond to the calculated ones, are given 
side by side. It must be understood that for each bay 
there are many other periods observed, though not so con- 
spicuous as those here quoted. 
Bay, 
Observed Period. 
Calculated Period. 
9. 
10. 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
21. 
22. 
23. 
25. 
26. 
28. 
29. 
30. 
31. 
Otaru 
Nemuro . . 
Hamanaka 
Mororan .. 
Hakodate 
6. Aomori 
Fushiki 
Tsuruga 
Tonoura 
Miyako 
11. Kamaishi 
Kojirohama. 
Yoskihama . 
Okirai 
Ryori 
Ofunato ... 
Niiyama ... 
Ayukawa 
Moroiso 
Shimoda ... 
Ise Sea 
Mikawawan 
Kushimoto 
24. Osaka 
Hiroshima 
Susaki 
27. Hososhima 
Aburatsu 
Nagasaki 
>> 
Futami 
Kiirun . . . 
13-8 m — 16*5 m 
10-9 
49-5 
51-1— 54-0 
45-5—57-5 
2P9-24-5 
295 
103 
541 
56-7—62-9 
11-9-12-9 
21-3—22-0 
24-8-26-0 
20-3 
24-6 
18-5—20-1 
27-5—29-9 
18-3 
360—39-1 
64— 76 
6-8- 8-9 
13-8-15-6 
13-8-18-2 
390 
208 
16-5—18-6 
11-6—130 
260—310 
106—150 
61—66 
60-0 
176—18-2 
15-0—16-3 
17-8-20-3 
6-5— 8-7 
150—190 
34-5-37-6 
22-5—25-2 
160-200 
25-3—29-6 
17-3 m 
90 
48-2 
48-9 
453 
23-6 S 
284 
106 S 
52-7 
590 
111 
45-4 
24-0 S 
24-8 
22-3 
260 
21-1 
26-4 
18-4 
364 
7-5 
8-9 
13-4 
13-3—15-9 
363 
217 
18-3 
12-8 
270 
126 
63 
61-6 
39-1 
160 S 
17-0 
19-0 
6-3 
15-1. 
37-5 
22-6 S 
13-6 
25-8 
It will be seen from the table that in most cases, the 
periods calculated by the simplest formula (1), that is, 
U 
T = 
^gli 
agree fairly well with those actually observed. 
Phil. Mag. S. 6. Vol. 15. No. 85. Jan. 1908. 
Thus for 
I 
