1. Calcium carbonate content of deep sea sediment decreases abruptly in deeper bottom than 4000-5000 meters. The temperature, pH, chlorinity, oxygen content and calcium concentration of sea water indicate that the abrupt decreasing of CaCO₃ is probably not due to these characters of deep sea water.
2. Calcium carbonate content of deep sea sediment in the equatorial region is highest in the region from Lat. 4 to 8 N, and decreases both in north and south of it. This region corresponds to area of Equatorial Counter Current. The correspondense of the boundary of current to the distinct changing of CaCO₃ content of deep sea sediment suggests that the sinking current originated in current rip reaches to deep water.

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We consider the diurnal variations of water temperature in the upper layer of the sea and the gradual increase of the water temperature at the sea surface after the cooling due to the passage of typhoon 5906.
Among many factors contributing to the heat budget, advective transfer of heat is neglected and outgoing heat from the sea surface is assumed to be constant throughout a day.
Within the water the vertical heat transfer due to the conduction is considered.
The result of these calculations is as follows: the daily range of the surface water temperature is 1.2°C, 0.8°C and 0.65°C as the amount of clouds is 0, 5.5 and 7.0 respectively in assuming heat transfer coefficient is 0.55 cal/sec. And the increase of the water temperature in a day is about 0.25°C, 0.1°C and 0.05°C respectively in the case shown above.

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The significant breakers occurred on the beach of Imabari, when 3DEs of 7th Escort Division on July 1959 and DD “TAKANAMI” belonged Kure Regional District, on February 1960 passed along the Bingonada Course to west, shown on fig. 1 and these breakers damaged some fishers and many fishing boats on the beach.
Taking consideration of these accidents, JMSDF conducted the ship running test off Imabari of the same course by DD on July 1960, with the object of obtaining the necessary data to navigate safely on that sea.
In this paper, we report the outline of this test and the results obtained by making use of these observed data. They may be summarized as follows:
1. Even if the ship turns to the west from the south-west near No.1 Buoy, the transverse waves created before she turns continue to advance directly toward the coast of Imabari, because the coastal line makes a right angle with Bingonada Course.
2. As the ship moves at 22 knots or more, these waves are refracted by the effect of the bottom topography on their way, and their orthogonals concentrate at the central part of this coast and Mihocho beach. As the result, these waves become higher in height at these beaches. But, when ship speed is 18 knots or less, Gunkan-nami does not quite appear or a little, because these waves are not affected by the bottom topography except near the coast.
3. Gunkan-nami becomes higher especially off the central part of Imabari beach. Tidal current bends the direction of wave to current direction, so, these higher waves reach Mihocho beach while north current and Tempozan beach while south current.
4. Even if the type of ship is different, we can roughly calculate about the height of Gunkan-nami, if the ship speed, the transverse waves' height and the length of the wave crest are known.

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Several data concerning the Tsunami of May 24, 1960 are presented.
How could we warn the Japanese people of the attack of the tsunami? The generation of a big earthquake off Chile in the early morning (Japanese time) on May 23, was known in the afternoon in the houses where the seismographs are managed. Then they should have listened in the broadcast from the Hawaiian station. Or they should have been accustomed to have a connection with the Hawaiian centre, according to the present author's theory and warning.
The complemental observation: We could know neither the weaker tsunami came in Ariake Sea and Yatsushiro Bay (Kyushu Island) than that which came along the coast of the outer ocean, nor the stronger tsunami came. Tomoaki Hama et al observed the stronger one and called our attention to this district.
The reconstruction: At Kiritappu (Hokkaido, Japan) a permanent bridge is under construction over the strait made by the cutting of the sand bar. And the tidal establishments are being built.

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The distributions of iron and aluminium in sea water were studied in Uranouchi Bay, Kochi pref., Japan, where the bay is not so much affected by land water or open sea water.
Analyses showed that 3.4-589.7 γ of iron, and 3.5-528.8 γ of aluminium were contained per liter of sea water.
Iron was similar to aluminium in its distribution, and both elements were contained in sea water near the surface and also very adjacent to bottom in the inner and outer areas of the bay.
Concerning the ratio of the elements, the results of the present investigation were compared with those of Urado and Susaki bays, which were already reported.
The ratio Fe/Al by weight was approximately 1 in this bay, while it was slightly more than in Urado Bay and, on the contrary, slightly less than 1 in Susaki Bay. It seems probable that those differences are derived from such hydrographical conditions as flowing-in of land water and the depth of sea, etc., and become one factor indicating the feature of each inland sea.

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The distribution of Sn in such marine fishes as Pneumatophorus japonica, Pneumatophorus tapeinocephalus, Lophius litulon, Katsuwonus pelamis, Trachurus trachurus, Monocentris japonica, and Chrysophrys major were investigated.
Sn was isolated by the ion exchange resin from the solution obtained by dissolving the the ashes of fishes in HNO₃, and determined by the polarographic method in the supporting electrolyte of HCl (6N).
Sn is one of trace elements composing ashes, but comparatively abounding next to Zn. The parts of fishes containing 0.250-0.020 milligram atom of Sn per 1 g of ash amount to 10%, 0.020-0.005 mg atom of Sn to 40% and less than 0.005 mg atom of Sn to 50% of total subjects.
Generally the amount of trace metal is largest in inner organs, less in flesh, and least in hard parts as head, bone, scale and gills. However as in Table 1. in the case of Sn there are many exceptional cases, namely Sn is concentrated in such parts as gills and bone of Katsuwonus pelamis, head of Pneumatophorus tapeinocephalus, bone of Pneumatophorus japonica, gills of Trachurus trachurus (large), head of Monocentris japonica, and fin of Chrysophrys major.
It is interesting that throughout these fishes livers are poorest in Sn and hearts contain 0.01-0.02 mg atom of Sn, but in other inner organs the content of Sn is very different to each other. The quantity of Sn in stomach of Pneumatophorus tapeinocephalus is very different between spring and autumn fish, but the same in testes.
Generally flesh contains 0.010-0.002 mg atom of Sn.

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