Vapour, superheating method

Extensive work on ebulliometry was carried out by Swi toslawski who developed ebulliometers in which both the temperature of the boiling liquid (reduced as far as possible from its superheated condition) and of the condensing vapour are measured the value of these ebulliometers for measurement of vapour pressures by the comparative method was demonstrated by Zmaczynski. Rossini and his co-workers, however, in their work on hydrocarbons from petroleum, preferred to measure the condensation temperature only, and in the past 20 years workers in this field have divided into two groups one, of those who follow Swi toslawski and measure two temperatures in each ebulliometer, and the other, of those who follow Rossini and measure only the condensation temperature. 

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