( 89 ) 



5ï^.VI 



at 9°,5 has been investigated. As it was especially important to 

 learn as well as possible the character of the plait at one definite 

 temperature, corrections were applied for slight differences in order 

 to reduce all the determinations to the same temperature. The results 

 obtained as derived from the determination of ton coexisting phases 

 are only provisional ; but yet they are sufficient to show us the 

 character of the plait as resulting from the observations. A graphical 

 representation of the results will be sufficient. 



Fig. 5 gives the quantity of methylchloride contained in the mixture 

 {:e of VAN DER Waals) in function of the pressure in atmospheres (as 

 ordinate) for the liquid- and for the vapour-phase. Fig. 6 shows 

 further the value of the logarithm of the volume in function of x. 

 As unit of volume of a mixture we have chosen that at 0° C. and 

 1 atmosphere. For the sake of a convenient representation the loga- 

 rithm of the volume instead of the volume itself has been chosen 

 as ordinate (turned towards the bottom of the page). From this figure 

 and some lines drawn in it, which connect the coexisting phases 

 we may immediately deduce the projection on the x-v plane of the 

 connodal curve with the conjoint points of contact. 



