The geographical distribution of Japanese chemical plants operated by the corporations whose capital stock is over 1, 000, 000, 000 can be summed up as follows from the viewpoint of added value indexes. The plants for productive goods falling under Group No. 1 such as fertilizer, sodium, and vinyl are spreading all over the country, whereas those for direct consumption goods such as medicine, paint, end pigment are mostly located in Tokyo and Osaka areas. During the initial period of development of the industries of Group No. 1, these city areas were within easy access to cheap village labour and coal fields and, what was more, they could supply surplus electric power at night to these industries, whose advantageous features, however, are no more available. Despite this, chemical interests in these city districts are still expanding their production facilities by addition of new plants and by enlar gement of existing ones. This phenomenon is due to close interdependence among chemical industries for the supply of raw materials. A large chemical company is characterized by the self-sustenance of materials, producing its whole requirements in its component plants, which is true especially in the recent petroleum chemical industry. They can be grouped into several classes according to holding companies, but interests owned by the private banking institutions in the city are by no means small in volume. Since the chemical industry has very small outside jobs and since its finished goods are mostly turned out from factories in city areas, its production activities have almost nothing to do with its neighbourhood, excepting the procurement of labour.
Explanation of Tables and Figures. Table 1. (a) Geographical distribution of the nation's chemical plants shown by value added. (b) Geographical distribution of the operatives employed in the chemical plants in each prefecture shown by value added. Table 2. Chemical plant combination. Table 3. Chemical ;plant combination of Group No. 1. Fig. 1. Location of the nation's chemical plants. Fig. 2. Sketch showing interdependence among the chemical plants for materials. Fig. 3. Geographical distribntion of the petroleum chemical plant. Fig. 4. Structural sketch of a petroleum chemical plant.

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The Ena Basin is located along the western margin of the central mountains, bordered by the bold Adera fault-scarp. Along the southern margin, the basin is separated by the Byobusan fault-scarp from the Mikawa highland, which descends abruptly from the central mountains with rather a small relief and similar altitude of 500-700 meters.
On the other hand, the northern and western margins of the basin are obscure. The basin floor penetrates northward into the mountain-land along the valleys; in the west of the basin there extend vast flat-topped hills of about 400 meters. Therefore, the basin opens to the west.
The Kiso River is cutting a deep gorge at the northern margin of the basin, but the floor of the basin is a hillland of rather low relief, composed of Toki gravel beds and partly of granitic rocks.
It is concluded that the basin has been formed by down warping to the east with faulting NWN SES and ENE-WSW during and after the deposition of the Toki gravel bed, from the fact that the Kiso River cuts down a deep gorge in an antecedent course, and that the Toki gravel bed shows similar vertical changes of gravel size and contains lignite seams at almost the same altitude at every place.
The uplands in the basin are subdivided into several terraces as follows (Fig, 5):
1: Alluvial plain
2-4: They are terraces and most of them have charcters of rock bench except the elevated fan along the Nakatsu River. It is very difficult to correlate each other for their irregular distribution and the absence of the key bed or gravel.
5 (Akatsuchidaira): They are higher elevated fans by the Nakatsu River and others, whose deposits were supplied from the Byobusan fault-scarp.
6: They are the erosion surfaces by the Kiso River which consist of only the Toki gravel beds; the Akatsuchidaira beds deposited on this surface.
7: This is pediment-like surface consisting of the Toki gravel bed and granitic rocks, and their features are very complicated. They were formed during and after the time of deposition from the Byobusan fault-scarp, but the foot of the scarp and the Akatsuchidaira have been disconnected by erosion since then.

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In the limnological research, lake temperatrure is the most basic and important factor, but it has not been explored.
Then the author tries to treat thermal stratification of the lake in relation with other factors.
Thermal stratification in the summer stagnation is decided by the following three factors
a) convection
b) conduction
c) turbulence
The author studies the turbulence from the standpoints of the depth of the thermocline and the transportation of heat to the deeper layer.
From the results of these studies, the author wishes to conclude as follows:
1) The depth of the thermocline correlates with the length of the wind run.
2) The heat transfer to the layer 0_??_5 meters and 5_??_10 meters gradually increases from March to May and decreases in small lakes, but in large lakes, it increases from March to June.
3) Turbulence gradually decreases from spring to summer in every lake, and its decreasing rate depends upon the size of the lake.

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