β Scribed by F.J. Weinberg
No coin nor oath required. For personal study only.
Followlng a previous deraonstra[ion that smaU amounts o[ electrolysis produce "developable' traces ca photographic emulsions, and that this principle can he used to record ~he distribution o] ion current arriving on an el,g/rode, a method of 'photographing' I~ames (or other u~eak ion sources) by the ions they emit is elaborated. Matrices which permit [he passage ot current but not of light are constructed by embedding wire brushes in slabs of i~ulating am[ opeque ~naterial; photographic emulsions are sandwiched bel~oeen these and the ~Jectrodes,
The resolving power and sensitivity o! these systems is considered and conditions ]or minim.. ising dit~ergcnee o[ ion teaiec(o~ies due to space charge-induced distortion of ttte field is discussed, An expointental metlwd o/ controlling such divergence is developed based on i~lToducing insulating suvlaees which acquire everywhere the local equilibrium charge /tom the ion cloud and, thereap~r, act as electrostatic lenses making lines o! ]orce tangential to their own contours. The discussion o~ the method is illustrated by ion records using smal~ laboratory flames as so:,roes.
π SIMILAR VOLUMES
The proportion of aerosol desolvatation in sample introduction in different volatility systems and the possibility of solvent-type-independent sample introduction based on nebulization of O/W type macroemulsions were investigated. It was found that desolvatation governs sample introduction if the vo
Recent attempts within this laboratory to demoiistratc by radioautography the specific localization of low concentrations of i.adioisotopes in rat tissues have emphasized the danger of liistochemical fogging of photographic emulsion. Boyd and Board ( '49) called attention to this phenomenon, and mor