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Volume 15, Issue 1
Displaying 1-7 of 7 articles from this issue
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G. Yamamoto1937 Volume 15 Issue 1 Pages 1-5
Published: January 05, 1937
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSThe Theory of wet and dry bulb hygrometer given by G. I. Taylor at 192_??_, in which he introduced the idea of the eddy-free layer in deriving the hygrometric formula, has now been applied to the phenomena of condensation of dew, and following formula has been derived for the quantity of dew where w g/cm2. min. is the quantity of dew, R cal/cm2. min. the net outward radiation from the surface of a body, t°C air temperature, fmm Hg water-vapour pressure, t°C surface temperature of the body, f'mm Hg the saturated vapour pressure at temperature t' °C, b mm Hg atmospheric pressure and A the constant which has the following m_??_aning where ε means the specific gravity of water-vapour as compared with that of dry air, D the coefficient of diffusion of water-vapour through air, Cv the specific heat of air at constant volume and K the coefficient of temperature conduction. So that the numerical value of A is 2.8. On the other hand if we have the observed value of w, R, t, f', t', f', then from equation (1) we can also determine the value of A experimentally. This also tried, and we got as the numerical value of A, 2.7, which is in good agreement with the theoretical value.View full abstractDownload PDF (881K) -
S. Fujiwhara, K. Takahasi1937 Volume 15 Issue 1 Pages 5-6
Published: January 05, 1937
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSAn evaporimeter the principle of which was already reported was made, and compared with the evaporimeter which is used in daily meteorological observation. The agreement of readings of both the evaporimeters is excellent. Some notes about future improvment are presented.View full abstractDownload PDF (697K) -
K. Takahasi1937 Volume 15 Issue 1 Pages 7-16
Published: January 05, 1937
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSThe occurence of earthquakes was analysed statistically, and found following nature.
(1) The great earthquakes in Japan and world have periodicity about forty years.
(2) The number of earthquakes in the next day or the month of a day or a month, in which earthquakes occure very often, is rather little, on the contrary, it is rather numerous in the next day or month of these in which earthquakes occurvery seldom.
(3) The durability is considerable, and it increases with time.
(4) Some consideration was made on these properties.
(5) The discussion was made also on the Watanabe's theory of durability.View full abstractDownload PDF (642K) -
Y. Daigo1937 Volume 15 Issue 1 Pages 16-29
Published: January 05, 1937
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSIt is the most important problem for the time to come, that we know distribution of favourable and unfavourable zones for barley culture as seen from the climatic environment to culture the right crop in the right locality in Japan proper.
In this study has been investigated relation between the barley and climate by following two methods, i.e. annual comparative investigation and local comparative investigation.
There are two varieties barley, which they have been cultured in Japan proper, common barley and naked barley, and those two varieties are contained in same species. (Hordium. Vulgare or Hordium. Sativum).
I Relation between climate and yield of barley.
A. Annual comparative investigation.
Larger correlation coefficients between annual weather elements for each month from the autumn of the previous year until after harvest and yield of common barley and naked barley in the 3 prefectures (Common barley: Miyagi, Gunma and Gifu. Naked barley: Ibaragi, Hirosima and Kumamoto.) during the period from 1902 to 1933, are as follows. (Table I)
B. Local comparative investigation.
In this investigation has been compared climate with yield of barley in various districts of Japan proper from a horizontal view.
Period of Barley culture is long in comparison with other crops and condition of influence of every climatic elements will vary with each stage of barley culture, ther_??_fore we must classificate the period of barley culture into some short stage
I have been classificated on three stage, as such the first stage (from November to December) in which barley is planted, the s_??_cond stage (from January to March) to developing in it root of barley under the ground and the third stage in which barley is grown vigorously and borne fruit. (from April to June) Results of this investigation are as follows. (Table II)
The result of above both investigation for relations with climate and barley, in which it infered that most important factor for barley culture is rainfall, is on the whole very similar to those of wheat. In a wood, barley grown as well as wheat on the same soil under the same cultural conditions contained, on average, a higher yields when grown in the district of slightly p_??_ecipitation than they did when grown in the humid climate of Japan.
II Determination of climatic zones.
As a result of above investigation between the weather and yield of barley has been determined eleven climatic zones for common barley and eight climatic zones for naked barley by the various degrees of analogicality of climatic environment.
Favourable zones for common barley culture are Nagano-ken and every prefectures from Kanto district to Iwate-ken, and unfavourable zones climaticaly are every prefectures of the Japanese sea coast in the north of Fuk_??_i-ken and sou_??_heastdistrict in Japan proper.
On the other hand, favourable zones for nake 1 barley culture are following prefectures, Okayama, Hyogo, Fagawa, Nagano, and every prefectures of the Pacific coast from Kanto district to T_??_hoku district, and unfavourable zones, in which naked barley can be cultured unsuccessfully, are every prefectures of the Japaneee sea coast of north of Fukui-ken.View full abstractDownload PDF (1146K) -
Y. Daigo, K. Ono1937 Volume 15 Issue 1 Pages 29-37
Published: January 05, 1937
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSIn this paper has been investigated the earth temperatures of paddy field and pot for agricultural experiment use at various depths in which the rice-plant would be grown. The following results have emerged:
1. The daily variations in temperature are greatest in the soil of po_??_ and become less for each increase in soil depth at paddy field, It is most interest, that the diurnal range in the earth temperature of the paddy field is considerabe to depths of about 7cm. but in the earth temperature of pot is conspcuous to depths of about from 7cm to 19cm.
2. The earth temperature of pot is generally very higher than the earth temperature iu paddy field on the clear day, but on the rainy day its' slightly lower than the other.
3. The soil temperatures of various parts (east, south, north, west and center) in pot changes with taking the placc of the sun, and therefore the difference between the soil temperature of the one side of pot, which it exposes to the sun, and of the other side of the pot, is very larg.
The difference of soil temperature between common paddy field and Pot will have considerable influence upon the plant growth, yet the actual effccts are not known at all.View full abstractDownload PDF (608K) -
H. Futi1937 Volume 15 Issue 1 Pages 37-47
Published: January 05, 1937
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSIn my previous paper the general solution of the equation of motion on the non-stationary atomospheric currents was shown. And in this paper for convenience of numerical calculations under the special conditions such as
For the examples of the above solution when initially wind-velocity (Wχ=Wν=0) is zero and
(1) the pressure gradient is constant (see Fig. 4. and Fig. 5)
(2) the pressure gradient increases linearly with time (see Fig.6)
(3) (a)the constant pressure gradient rotates gradually with the clock's hand (see Fig. 7 and Fig. 8)
(b) the constant pressure gradient rotates gradually with the counter-clock's _??_ and (see Fig. 9. and Fig. 10), the wind-velocities are calculated by which we can see what manner the surface winds develop with time.View full abstractDownload PDF (404K) -
T. Asahina, Y. Miyake1937 Volume 15 Issue 1 Pages 47-48
Published: January 05, 1937
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSThe chemical composition of natural gas evolved at the Arakawa diversion channel in November 1935 has been studied.View full abstractDownload PDF (135K)
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