As the appropriate level for the balloon bombs 10-12 km level has been selected, for the level is the barotropic surface with maximum westerly currents. During the winter 1944-1945, many balloons were sent to United States from Japan, for this period is characterized by heavy baroclinicy in the middle latitudes and hence the greatest strength of the westerlies is found in winter. Two or three days will be enough to send balloons through the upper troposphere, if the conditions are favourable.
The ratio of sulphate to chlorine is always constant (viz. 0.13648) in ordinary pelagic water. But the writer found in several bays (Heda Bay, Mera Bay, Arari Bay, Uchiura Bay, Nakagi Inlet, Nagatsuro Inlet etc.) in Izu Peninsula the fact that the ratio (SO4″ : Cl′) deviated from the standard value and showed anomalies, because sulphate being consumed owing to the activity of sulphate-reducing bacteria existed in the water. If ventilation of sea water were free, anomaly could never occur. The stagnation of a bay can happen on account of geomorphological cause, such as existence of a submarine threshold in front of a bay or enclosed topography underneath the surf ace water. If we should be able to gain certain relation between the anomaly and inorganic sulphur contained in bottom material, the study on sedimentary rock would be brought to light, so far as sedimentational environment (anaerobic condition) is concerned.
Fifty-two miles to the north-west of the port of Inchon lies the small island of So-nYonpyong-do. Evenly distributed on the summit of this island's hill is to be found an are deposit of the eutectic mixture of ilmenite and vanadium-bearing magnetite occurring in bedded form and as a product of magmatic differentiation in the spotted pyroxenite derived from gabbro. This are deposit has twenty meters in thickness and spreads over an area of twenty-six thousand square meters. The are reserve is estimated at 2, 300, 000 metric tons. The typical are runs 50% in iron, 20% in titanium dioxide and 0.24% in vanadium. This are deposit ranks highest as a titanium deposit in Korea. By either oil flotation or magnetic separation, the are could be separated into ilmenite containing 47% TiO2 and vanadium-bearing magnetite containing 65% Fe. Great hopes are placed on the development of this are body, as Japan is poor in titanium resources.
In most cases the mixed constitution of peoples means the confusion of the characteristics of their cultural landscape. This is especially true when their cultural stages are on the same level. Malay Peninsula is an exceptional place where we can observe that different characteristics of cultural landscapes represented by different groups of people are well preserved side by side. In 1945, the present writer lived a few months in one of small villages on the west coast of that peninsula. In this paper he tried to analyse such stratification of cultural landscape from the view point of development of cultural stages. He takes the rural settlements of Malays as the initial form. It is overlaid by the cultural landscape of British, in the form of road construction and rubber estate. Chinese develop their settlements in two different types. The one is that of commercial Strassendorf along the road, and the other is the type of agricultural disseminated villages. These are perfectly identical with the types they have in their home country, South China.
This is a transparent section paper with a stricken graduator of the formations (I in fig. 1), a. measure of dip angle (II in fig. 1), and diagraph of thickness (III in Jig. 1). By moving the paper on the geological map, we can determine the strike, dip angle and thickness of the formations without calculating.