Following G. I. Taylor's vorticity transport theory, and assuming the eddy viscosity K as a function of the vertical gradient of horizontal current velocity (u, v) in the type of K=K0 the present author concluded that: 1. Under these assumptions, the air current accurately attains the gradient wind at a finite height. 2. Generally the height of gradient wind increases as the gradient of current velocity increases.
Simultaneous continuous records of both space-charage and potential gradient have been made only at a small number of stations. The present paper is based on such a series of records obtained during the year 1934 at Toyohara Magnetic Observatory, S. Karahuto (S. Sakhalin). The space-charge was recorded automatically on sensitized paper by spherical metal-cage method. To avoid the effect of contact potential difference the whole measuring system, metalc-age, collector, conducting wire and earthing wire, was made of the same metal, brass. The diameter of the spherical metal-cage was 1.19 in and the Radio thorium collector was used. It was connected to the quadrant electrometer of compton-type. The annual variation shows a maximum 0.24 E. S. U. m-3 in Winter and a minimum 0.10 E. S. U. m-3 in Summer. The annual mean valued is 0.17 E. S. U. m-3. The diurnal variation shows a flat maximum 0.24 E. S. U. m-3 at about midnight and a minimum 0.08 E. S. U. m-3 at about 13h. Fluctuations from the average state are remarkable in night hours and contrary in day hours, as can be seen from the figures inserted in the text. This is nue to the heterogeneity of the electrical state of the atmosphere near the earth surface, and rather slow variation of wind direction and velocity in night hours and contrary in day hours. The diurnal variation of potential gradient shows a first maximum in the morning and a second maximum in the evening as in other places, and its type very much differ from that of the space-charge. This may be due to the fact that the potential gradient not only depends on the density of space-charge but also on the surface-charge. Two examples of simultaneous records of the potential gradient and space-charge on the occasion of rain-fall and snow-fall are inserted in the text.
In the present paper the transmission coefficients due to the dust, c and x, in the expression _??_ as adopted by Angstrom, were computed by the method of numerical integration. The data used were taken from the results of observation made by Dr. Yazaki and his collegues with the Linke-actinometer provided with two Schott filters, OG1 and RG2, in Zikei college of medicine during the interval from May 1933 to June 1934. The principal facts deduced from the statistical investigation of the results of this computation are as follows: The atmospheric condition, so long as we have regard to the dust only, in worst in winter, owing to the abundance of the smoke ejected from the chimneys of government officies, companies and other buildings, and is comparatively good on Sunday. The turbidity varies with the velocity and direction of wind. It is large in the calm weather, and becomes minimum in 2_??_3m/sec, and maximum again in 5_??_8m/sec, and then gradually decreases according to the increase of velocity. It is least in the case of the southerly wind. It was suggested that the extinction of dust might not be expressed by the simple formula _??_ alone, in the local, exceptionally turbid atmosphere such as is above Tokyo.
I have studied a mercuric nitrate method and Mohr's method for the estimation of very dilute solutions of chloride, and have found the latter is more convenient for this purpose. Values of corrections and accuracies of Mohr's method are obtained for a practical use. There is a logarithmic relation between the excess amount of silver ions and the chloride concentration, and this is explained by the adsorption of silver ions on silver chloride sol.
Mohr's argentometry which is the international standard method for the chloride determination of sea water, has many demerits from a point of view of the analytical chemistry of to-day. I have tried to use Fajans' adsorption indicator method instead of Mohr's, and obtained very satisfactory results. The indicator used is a mixture of 5cc of 0.1% uranine (sodium salt of fluorescein) solution and 100cc of 1% starch solution. 2cc of this indicator is added for each 15cc of sea water, where starch serves as a protectivecolloid. This modified Fajans' method surpasses Mohr's in the following points: 1. There is no fear that an end point comes too early. 2. There exists no error due to the sensibility of the indicator. 3. The colour change at an end point is quite clear. 4. It is unnecessary to add any distilled water to avoid the coagulation of silver chloride. 5. The time needed for each titration is shorter than half of Mohr's. I have also made an attempt to use the pure potassium chloride solution in place of the normal sea water, this attempt has proved successful.
Two terms were introduced in the usual equation of motion of perfect fluid, one is very small resistance proportional to the velocity, and the other is irregular disturbing force. The diffusion in the turbulence was discussed by means of the above equation, and the result of which is that the diffusion is proportional to time for small value and proportional to square root of time for large value. The differential equation of diffusion, the eddy viscosity and others were also calculated. Lastly, the comparison of the result of the theory with the scattering of balloon in the atmosphere was made, and the order of the new term of resistance was estimated.
The distribution of the striken villages, which were heavilier suffered compared with the neighbouring villages, by the earthquake which attacked the Shizuoka prefecture on 11th, July 1935, is examined with the light which was first given by Prof. S. Fujiwhara on the distribution of the parasitic crators of Mt. Fuji. The fundamental idea of the present paper is that; due to the elevation of Mt. Udo many weak lines may appear along the lines of flow in the plastic earthcrust. When an earthquake attacks this region, the places on the weak lines suffer larger shocks and accordingly the damage may be considered to be severer than that on the othe places. Those villages lie on the seven lines which may be considered to belong to three groups and one questionable line.
The same problem as is treated by Mr. Kurasige in this magazine is discussed in another coordinates-system. As the form of the elevation of Mt. Udo is an ellipse, it is more natural to consider that the weak lines are equiangular to the conformal ellipses rather to the concentric circles. Thus we get a more natural result.
In this paper the author studied on the relation between the diurnal variation of the cloud amount and that of the atmospheric pressure at Taihoku and found that they correlate negatively as was expected.