Ternary solid solution including CaO·Al₂O₃·2Fe₂O₃ has been synthesized, and the chemical composition has been determined by electron micro-probe analysis after quenching. The experimental runs were carried out in air. All crystals of the calciumferrite which is called the βT phase hereafter, have grown from melts during the fall of temperature. Results of electron micro-probe analysis show that the chemical composition of the βT phase distributes in a narrow belt which extends nearly parallel to the Al₂O₃-Fe₂O₃ side of the CaO-Al₂O₃-Fe₂O₃ ternary phase diagram. At 1100°C, the βT phase is stable in the region between 5CaO·xAl²O₃·(11-x) Fe₂O₃ (x=0.59-3.85) and 2CaO·xAl₂O₃·(5-x) Fe₂O₃ (x=0.33-1.84).At 1300°C, however, the βT phase is stable on the composition line of CaO·xAl₂O₃·(3-x) Fe₂O₃ (x =1.19-2.56). The melting surface and primary phase field of the βT phase have not been determined exactly in the present work. But it was found that a high-Al₂O₃ part of the βT phase melts incongruently. From the relation between the primary phase field of this solid solution and its chemical composition analyzed in the present work, the phase diagram determined by Dayal and Glasser (1964) should be rechecked.

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Variation of longitudinal wave velocity with respect to water content was measured for various rock types by ultrasonic method, and the relation between rock texture and longitudinal wave velocity was investigated.
The experimental results show that the variation of longitudinal wave velocity is characterized by the indices of velocity difference in dry and saturated states and hysteresis phenomenon, which means here the velocity difference between evaporation and suction processes.
Comparing crystalline rocks with other rock types, the indices (Is) of velocity difference in saturated state of crystalline rocks are extremely larger than those of other rock types.This is mainly caused by the difference in rock texture.Namelyth e shape of pores in crystalline rocks is in the form of cracks. On the other hand the large indices (Id) of velocity difference in dry state are obtained by the cases of rock specimens which consist of clay minerals in matrix. From this result it is suggested that the degree of velocity increase in dry state depends on clay minerals.

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In the present paper, for the purpose of considering the performance of nozzle of the hydraulic cutting device and mechanism of the hydraulic fracturing, the authors investigated theoretically and experimentally the fl ow characteristics of continuous water jets issuing into a quiescent air ambient.
The analytical relations of momentum theory are proposed on experimental fi ndings for the width of jet spread. The pattern of the jet spread is proved by means of the electric method, the Pitot tube method, the photographic method. Further the jet velocity of center line is determined by means of the laser velocimeter method. Water jets are characterized by three distinct regions, potential core region, transitional region and main region.
The good agreement between the experimental and theoretical values of axial fluid pressure in a water jet is obtained under the condition that the transitional region is taken into account in the calculations.

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The velocity distributions in fully developed turbulent flow of pseudoplastic fluids in annuli were investigated by dimensional analysis method employed by Millikan.
The validity of the theory in this study was examined by using the experimental data. Mean velocity distribution and the location of the maximum velocity were measured in the turbulent flow of Newtonian fluid and pseudoplastic fluids in annuli. Diameter ratio k of annuli and flow behavior index n were varied between k=0.118-0.642 and n=0.870, 0.823, 0.760, respectively and Reynolds numbers were ranged from 4580 to 102000.
It has been found that the point of maximum velocity in turbulent flow in an annulus do not depend on flow behaviorn, but diameter ratio k.
In addition, the analysis permitted the prediction of mean velocity of turbulent flow of pseudoplastics fluids in an annulus.V=u*₀[A_0nkln{R₀ⁿρu*₀^2-n/K(1-λ)ⁿ}+B_0nk]-n/2(1+k) A_0nku*₀ (3+3k-2λ)k=ratio of radius, λ= dimensionless radial distance of maximum velocity, n=flow behavior index, K= fluid consistencyi ndex, ρ= density, R₀= radius of outer tube of annuli.
u*₀=frictionvelocityreferredtoouterwallofannulus, Aonk, Bonk=fhnction of n and k in the outer regions.
To confirm the results due to theoretical analysis, the experimeptal tests were carried out by using the bentonite slurrles under the turbulent flow, and almost experimental data showed the validity about the above mentioned analysis within the mean deviation of 2.5%.

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The spectrophotometric determination method of sodium oleate, which was developed by R. Goiffon and M. Couchoud, has been modified to determine the amounts of sodium oleate adsorbed on nonsulfide minerals.
The method by R. Goiffon and M. Couchoud was based on a fact that sodium oleate prevents the color change of Nile blue solution from blue to red at pH 11. On the other hand, the new method is founded on a phenomenon that sodium oleate fades the blue color of Nile blue solution at pH 8. The difference in absorbance of Nile blue solution at pH 8 between the absence and the presence of sodium oleate is maximum at 594 nm of wave length.
The difference in absorbance at 594 nm increases with the concentration of Nile blue, but it does not vary within several hours. Although the relationship between the difference in absorbance at 594 nm and the concentration of sodium oleate is not a linear one, sodium oleate can be determined at the concentration ranging from 5 x 10^-6 to 3 x 10^-5 mole/ l. Namely, the sensitivity limit of this method is about one tenth of that of the method by R. Goiffon and M. Couchoud.
The difference in absorbance at 594 nm is not affected by the presence of pyrophosphate, phosphate, sulfate, carbonate, oxalate, chloride or nitrate, up to 10^-2 mole/1 and by the presence of silicate ion, up to 10^-3mole/1. In the presence of hexametaphosphate ion, the difference in absorbance at 594 nm increases as hexametaphosphate ion concentration increases up to 10^-4 mole/1 and remains constant at the concentration range from 10^-4 to 10^-2 mole/1. Therefore, in the case where hexametaphosphate ion is contained in sample solutions, sodium oleate can be determined by adding 10^-4 to 10^-2 mole/1 sodium hexametaphosphate to a standard solution.
Based on the above results, the amounts of sodium oleate adsorbed on hematite surface are determined from the difference between initial and equilibrium concentration.

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Cadmium (II) reacts with an aqueous ammonia to form a hexa-ammine cadmium complex which is easily adsorbed on active charcoal by a butch method. The cadmium adsorbed on active charcoal is almost recovered rapidly by the shaking with a small quantity of 1M hydrochloric acid, the active charcoal could be reused as a regenerated charcoal.
Under the column method has been employed on the same concentration of cadmium solution which is used on butch method, the cadmium ion is completely adsorbed from an ammoniacal solution at pH 11.
The effects of the organic substance accompanying with cadmium ion examined about the aqueous solution of 10^-4M EDTA, 10^-2M glycine, 3×10^-3M n-octhyl alcohol and 5×10^-4M methylorange. The competitions occured between an aqueous ammonia and other complex agents such as EDTA or glycine. The concomitance effect would be observed between ammine cadmium complex and methylorange.

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Recovery of useful metals from bacterial leaching solution and abatement of waste water acidity by sulfate reducing bacteria were studied.
Treatment with continuous culture was effective for metal sulfide formation and improvement of waste water acidity but treatment with batch culture was impossible, because low pH and metal ions were obstructive of bacterial growth.
The optimum pH for treatment with continuous culture was 6.0, which agreed with the optimum pH for bacterial vgrowth. In the treatment with 40% leaching solution at optimum pH, the maximum rates of metal removal were obtained and their rates for Cu, Zn and Fe were 41.5mg/L/h, 18.1mg/L/h and 25.7mg/L/h respectively.
The maximum specific growth rate was obtained in the treatment with pH 6.0 and 20% leaching solution, which was 0.541/h. It was considered that the bacterial growth rate was accelerated as a result of harmless metal sulfide formation from hydrogen sulfide and metal ions which were harmful to bacterial growth, and cooperation between sulfate reducing bacteria and other microorganisms.
Contents of copper, zinc and iron in the black precipitation were 19.96%, 6.13% and 10.95% respectively and they were about 6.9, 38.0 and 1 times as those of the original sulfide ore.

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