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Volume 16, Issue 12
Displaying 1-3 of 3 articles from this issue
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R. Kuraisi1938 Volume 16 Issue 12 Pages 457-461
Published: December 05, 1938
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSIf a wind vane has one electrical contact, we can receive two kinds of signals, namely opening and closing, through one circuit. Therefore, when the vane has four contacts, we can receive 24=16 kinds of signals as the permutation of opening and closing of these four circuits.
The author has invented a new distant anemoscope, and its construction is as follows. Under the wind vane, there is a distributor with four sets of commutating segments A, B, C and D. Fig. 1 shows the distributor schematically, in which the blank parts are made of conductor and the hatched parts are insulated. Four brushes are fixed to the rotating axis of the vane and contact electrically to the segments. From the distributor and the brushes, five wires, constituting four circuits, are led to the indicating part and connected to four electro-magnets respectively.
In this indicating part, there are six circular plates (Fig. 3.) parallel to each other. Two of them are fixed to the frame, and on each plate 16 windows, corresponding to the 16 directions of the wind vane, are bored in equal distance on a circle. Between these two plates, the other four plates A, B, C and D are set. Each of them has also 16 windows but not in equal distance, and is rotated π/16 by the magnet clockwise and counter-clock-wise alternately, when the circuit is opened or closed. Behind these plates, there is a lamp, and in front of them, a milky glass plate, with etched figures N. NNE, … etc. corresponding to the windows.
When the wind vane situates in one direction, some of the circuits are closed and the magnets of these circuits act on the rotatable plates, and only one of the windows is opened. Therefore we can observe the wind direction instantaneously at a distance from the vane.View full abstractDownload PDF (278K) -
Y. Miyake1938 Volume 16 Issue 12 Pages 461-463
Published: December 05, 1938
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESScf. This Journal II 15 (1937) 529.
The quantities of the atmospheric impurities in central Tõkyõ have been chemically estimated since the last spring. The results are as follows.
max. min.
SO2(and H2SO4)-Sulphur 8.8γ/m3 0.1/γm3
Ammoniacal nitrogen 47.8 3.0
nitrite nitrogen 16.8 1.6
chloride 100.3 trace.
The seasonal variations of each components are also briefly discussed.View full abstractDownload PDF (235K) -
S. Akai1938 Volume 16 Issue 12 Pages 463-469
Published: December 05, 1938
Released on J-STAGE: February 05, 2009
JOURNAL FREE ACCESSThe author theoretically deduced a differential equation for the cooling of room-air,
where θ denotes the temperature of room-air, t the time, T the temperature of the free air outside of the room, v the wind velocity, α, β, δ, _??_, σ constants depending on the st_??_ucture and materials of building. On the other hand, the author observed the temperature of room-air by a recording thermometer at three different places in the office-room of Ootomari Meteorological Observatory in the cold season of 1937-1938, and confirmed that these results coincide with the above theory to a certain extent.View full abstractDownload PDF (1680K)
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