909 



basis of our measurements in 1910 (Comm. N". 116); q is in each 

 case the weight of oxygen per cm'', (concentration), A the approxinjato 

 ratio between this weigiit and tlie corres|)on(iing one in the pure 

 liquid; I indicates to some extent the dihition (only approximately, 

 because with the method followed A changes with the temperature) ^). 



TABLE I. 



Table I shows at once this qualitative result: 7%d specijic mag- 

 netisatio7i coefficient of oxygen becomes considerably greater, in pro- 



1) The various numerical data upon which the results arc based are not all of 

 the same degree of accuracy: the temperatures, measured by means of the pressure 

 under which the liquid boils, the same pressures being chosen for the ditfercnt 

 mixtures, may be compared in the one and the other mixture to 0.1°, the absolute 

 values, on the other hand, have the same degree of accuracy as the vapour 

 pressure curves. 



The directly found (volume) susceptibilities of the mixtures, which are not in- 

 cluded in the table, may be compared with one another to about 0.3% on an average. 

 As regards the specific nMgnetisation coefficients, if these may be compared for 

 the same mixture at different tcir peratures with the same accuracy as the sus- 

 ceptibility, their uncertainty in absolute value is specially determined by that of 

 the concentration; we estimate it on an average at 1.5 "/o, higher for the large 

 concentrations, lower for the smaller ones. 



