From a small glass tube liquid was streamed continuously at a velocity of 0.8-2.5m/sec to the absorption chamber filled with carbon dioxide gas of 1 atm. pressure. The diameter of the liquid column was 0.7-0.8mm, and the height was 1.5cm. Accordingly the time of contact of the gas and the liquid was 5/1000-2/100sec. When physical absorption takes place at this liquid surface such as the case of water and carbon dioxide gas, the distribution of carbon dioxide in the liquind will be expressed by the following diffusion equation:
the boundary condition:
the initial condition:
where c: concentration of CO₂ in the liquid, mol/c·c
c₀: saturated concentration of CO₂, mol/c·c
x: distance from the liquid surface, cm
t: time of contact, sec.
D: diffusion coefficient of CO₂ in the liquid, cm²/sec.
From equations (1) (2) and (3), the mean absorption rate of CO₂ during the time of contact, zero to t sec, will be given:
This theoretical absorption rate were compared with the experimental values, and the satis-factory results were obtained at systems CO₂-water, H₂S-water and SO₂-water.
The oretical absorption rate, with the simultaneous chemical reaction, was obtained from the following equation.
the boundary condition:
the initial condition:
where A: concentration of the solute such as alkali, mol/l
k: reaction velocity coefficient, l/mol. sec
c₀': modified solubility of CO₂, mol/cc
From these equations the mean absorption rate of CO₂ gas during the time of contact, zero to t sec, will be given
where
The absorbing liquids used were aqueous solutions of KOH, NaOH, Na₂CO₃, K₂CO₃, and NH₄OH of several concentrations and at each temperature. Absorption data of CO₂ by these liquids gave very nearly close values with the above mentioned theoretical rate Nm. Reaction velocity coefficient k are
for KOH, k=8000l/mol sec at 25°C
for NaOH, k=3000l/mol sec at 20°C
for NH₄OH, k=150l/mol sec at 25°C
The modified saturated concentration c₀' means the effect of the solute for solubility and expressed by the following experimental quation:
where c₀ is the solubility for pure water and α is a constant for each solute.

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1. Adiabatic cooling formula.
If the wet bulb psychrometer comes out adiabatic change, the following formula has to be given strictly.
And if the partial pressure and the temperature are used as an orthogonal coordinate in humidity chart, then the adiabatic change shows almost a straight line, and this chart is convenient for a practical use. (fig. 1 & 5)
2. Error due to radiation to the wet bulb.
This error is calculated theoretically, and is compared with the Carrier-Lindsay chart.
(fig. 3)
3. A formula on the wet bulb psychrometer,
The moisture, which is diffused from the wet bulb surface, carries heat quantity against the main heat flow, and so the following formula is given theoretically.
This formula equals approximately to the well-known formula.

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多管式の反応塔において触媒内置式と触媒外置式といずれが温度調節上有利であるかを理論的にしらべた結果,外置式の方が温度分布が均一で熱のとれ方も大きいことが分つた。但しこの論議のはじめには,妥当と思われるいくつかの假定と,ある簡單化とを行つているが,これらはいずれも眞の結論を逆にするものではないと考えられる。

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半向流連續抽出の間歇操作についての平衡論としてこのBakerの式を擴張して平衡恒數を導入した。次にこれを連續操作に拡張した理論式を導出し,抽出の濃度線圖を作製してBakerの式と比較した。なお本理論式に速度的な解釋を加味することについて研究中である。

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A slide scale nomograph was constructed from the general correlation for viscosity of liquids obtained by W.K. Lewis and L. Squire. To construct the similar nomograph for vapor pressure of liquids, the Hildebrand rule was examined with 18 liquids and the following general expression was obtained,
in which p and T are vapor pressure and absolute temperature of liquid, and α and β areconstants, universal for the normal or for the abnormal liquids.

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