In the previous reseaches we had found that this meter had many good points for the automatic indicator or controller of the concentration, but in the present stage of the developments it had several week points, such as the non-linearity of the response-curve and the limitation in the applicable range of concentration.
In this paper we aimed at the improvements of such inferior properties and experienced using the HCl and KOH aq. the relations between the response-curve and the B-voltage, Pt-wire insersion effect, the methods of measurement as well as the shape and size of cells.
The results obtained were shown in Fig. 3-14 as well as Table 2 and 5.
From the experimental results we concluded that:-
(1) Increasing the B-voltage, the output current and sensibility of the response-curve increased not to sacrifice the stability of current.
(2) Increasing the linearity of the frequency-output current curve, the linearity of the responsecurve will be extended to the higher concentration range.
(3) By the profitable selection of the shape and size of cell condensor and the method of measurement, the desirable response-curve answered the purpose will be obtained.

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固定層と流動層の境界として,流動化の始まるときの流速umfについての実験結果から(1)式における係数C_mfは,レイノルズ数のみの函数として表わすことができている18)。
[Onset of Fluidization] (1)これによって最粗空間率ε_mf,形状係数φ_Sの如何にかかわらずu_mfを求めることができるわけである。[Fluidized Bed] (2)流動層では(2)式がほぼ成立することが実験的に確められているが9)～11),(1)式中の(ρ_S-ρ_F)の代りに(Δ_p・g_c/L_a・g)とおいてu_mf以下の流速の遅い固定層にまで延長した場合ε_mf,φ_Sの値にかかわりなく同様な関係が適用しうるか否かを検討してみることにする。
以上の考えから出発して固定層における摩擦係数の一表示法として,(8)式で定義されるfv”(=1/2・C_mfに相当する)を筆者の実験結果および多くの文献データから求めてみるとほぼ一致した結果が得られた。(Fig. 3)
また流速の増加と共に固定層から流動層となり,極限としてただ一個の粒子の終端速度にまで流速が増大した場合について(8)式を延長して適用すると,固定層と単一粒子のそれぞれのf_v”曲線の間には単純な倍数関係が成立していることが分ったので,逆に粒子一個の抵抗係数CDを以て固定層の圧損失を(15)式のごとく表わすことができた。
これは固定層,流動層,単一粒子の流体抵抗を一貫して扱うという試みの一つの基礎となるものである。

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The theoretical solution of the coefficient of heat transfer by cooling or heating (without change in phase) of a Newtonian fluid in laminar flow have already been proposed by Graetz, Nusselt, etc.
Referring to those solutions, the author has tried to solve the heat transfer in laminar flow of a pseudoplastic fluid. Hasegawa has found that the velocity distribution of pseudoplastic fluids flowing in a tube can be represented by the following equation
by making use of which, the author has obtained the approximate solution for pseudoplastic fluids as follows:
provide,
The author's theoretical solution has been further developed into
in which, when n=2, the numerical calculation is as follows:
The curve n=2 in Figure 3 shows the theoretical relation of (h_MD/λ) plotted as ordinated against (WC_p/λl). The curve n=∞ shows the theoretical relation based on a rod-like flow, and the curve n=1, a Newtonian fluid. Based upon the theoretical and approximate solutions, it is to be found that (h_MD/λ) of a pseudoplastic fluids is in the zone where the curve n=∞ is lines superior and the curve n=1 is lines inferior.
Hence by the approximate solution, the author has rearranged (WC_p/λl)as{(WC_p/λl)(n+3)/4}. The theoretical relation may be represented by
The author has found that the logarithmic mean of the temperature difference between the bulk temperature of a fluid and the temperature of the wall is theoretically correct. The temperature profiles in the case of (WC_p/λl)<0.1 are shown in Figure 5.

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