( 437 ) 



FLUORBENZENE (Young). 



side. This latter tact, now, has heen found by C.\rdoso to a still 

 (n-eater degree for SO^, as immediately api)ears from the grapliical 

 representation '). I borrowed the following table from his paper. 



Between the two last values of m the locus is (piite straight, and 

 the coefiicient of direction 1,0 is calculated. 



If for tluorbenzene we take the mean value of f/ — i and 1— (/' 

 for 7Hr=(),i»5, we lind 3,2 V^l- m for it; for SO., we lind the coefffi- 

 cient 3,0 for //; = 0,91)5, and the coefticient 3,7 for ///=0,9H4. But 

 it has 'already desceiuled to 3,45 for in = 0,972, so that we may 

 assume, also in the case of C«H,F, that the value of the first coefiicient in 



theexpausioiiiu1(.series'^J=l±n'l/r--'-m + Hl— m)+c(l--mr7.-f etc. 



amounts to altoiil 3,6 near the critical point. 



1) In the graphical representation the porliun of llie saturation curve, determined 

 by Cardoso entirely covers the part of the .'saturation curve of lluorbeuzene lyin^^ 

 in the neighbourhood of Tl-. So SO^ may be considered as perfectly normal. 



