The 5urface len,ion table;; presented herein nr(; the result of a literature ;;urvey, evaluation. and compilation of data of "ome 2200 pure liquid compounds. 226 of which were reported for u sin;:;:]e temperature. Theel" are arranged with related compound. in the increasing order of their molecular weight". As far as possible the method of measurement. nature of atmosphere to whieh the liquid was expo~ed during mea!'llrenH'nt", and the e';limate.,] a('euracy are given for eaeh 1i(luid. The tabulated ,-alue" were eslculated from the derived results of directly measured quantities reported in the literature of many cQuntriee from ahout 18'/<1 to 1969. Preliminary plots of the experimentally m~a~ured-;Juantities indicated that the ""rfllce tension, of the liquid com• pounds are linear Innctions of the temperatnre over the reported oper8lional range. The prinf'jplt' of least ~quares WJ:H' applied to experimental surfare tcmion ,'aluee to ef'tahlish the regression <,unes and their equation,. The constants of the equatiollF (slope and intercept), together with the standard deviations aTe given for each ('ompOlmd. The selection factors eSlablishinl' criteria of qualhy of 811rfa~e leIJ~ioIl datu C:trt' uj~cu!:;~~u. Tlc.t:~t" judwh: (it) UJt:'lLwl vI JlJeu~uct"[J1(':Ht, (b) purity of compound, (e) quality of apl'aralus and ai;sernhJ;--, (d) experimental procedure (experi. mentation), (e) rcHahility oj mCSl;urement" (mOEt probable yaluee), (f) experience of inYe,;tiI'8toT, and (g) availabilil;.-of data. There are 27•1. references listed alphabetically.

This is ,the third of a series of three papers on the surface tension measurements of a series of n-alkanes and 1-allienes mntle :Lvailable by the American Petroleum Institute Research Project 44. I n the following there is described the procedure for measuring the surface tensions of the hydrocarbons isobarically under nitrogen saturated conditions. The method of lexst squares was applied to the data and linear equations obtained. The e uations were used to calculate the surface tension valueo which are presented in two 1,ables together with the constants 01 the least square equations. A third table presents least square constants for the latent heat equation, and also the enthalpy of the surface formation of the liydrocarbons.

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The vapor pressure of monofluoroacetic acid was studied as a function of the temperature over the range 20 to 170°. The method employed was an isotensimetric one with the use of a modified version of the Smith-Menzies apparatus in conjunction with an electronic mutual-inductance micrometer adapted for manometric use. The vapor pressures were measured in an all-glass system with the electronic manometer operating as a null-point detector. A diagram of the tensimeter is given together with two tables, one comparing the experimental and literature values of the test compound n-butyric acid, and the other a table of vapor pressures of monofluoroacetic acid.

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