894 



o. At the points of beginning condensation the accuracy is about 

 the same. The saturated vapour-volumes are given. 



6. The observations with the mixtures are compared with the 



pv ( B\ 



equation of state in liic form — = /^7' \ -\ — . The accuracy 



' 7(50 V "/ 



in — was found to be about 0,1 "!„. 

 760 



7. Within the range of temperatures iiivesiig.ited /"'/ /y for the 



1 



mixtures can be reni'esented as a linear tunction ot — , both for the 



points of beginning condensation and for the end-points. 



8. The px- and 7'(,'-diagrams are established. As regards the com- 

 position of the gas-phase (r) and the liquid-phase (r'j they were 

 found to satisfy the relation Uuj r' ^r= a A^ h loy r. 



9. Conclusions were drawn from the shape of the curves in the 

 diagrams in connection with a possible fractional distillation of 

 argon-nitrogen mixtures. 



We are glad to be able here to express our sincere thanks to 

 Mr. G. L. F. Philips for the unstinted support afforded to us by 

 which this investigation was made possible. 



We also wish to record our cordial thanks to Messrs. W. Koopman 

 and J. ScHARP de Visser for their zealous assistance in carrying out 

 the measurements and calculations. 



Fhi/sical and Cheuiical Laboratory of the Philips 

 Eindhoven. Incandescent-lamp tvorks Ltd. 



