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A very simple analysis of circuit reliability when the source of energy of 'power supply' is included shows that small independent sources of energy are needed. Several possible ways of satisfying this intuitively obvious need are discussed. (Author).
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An experimental study on the zone refining of the binary system triphenyl antimony-benzoic acid is described. The isotope Sb124, which is a strong gamma emitter, was employed as a tracer; this allowed a rapid in situ nondestructive analysis, closely spaced experimental points, and the opportunity to study distribution as a function of varying experimental conditions. With the aid of computers (IBM 7090 and IBM 7044) apparent k's were calculated and the experimental data compared with those predicted from various mathematical models. (Author).