190 



Prof. W. Ramsay and Miss E. Astou. [June 14, 



The radius of the tube was 0'01046 cm. 



The calculated height given is the mean of the heights of chloro- 

 benzene and ethylene dibromide, corrected for temperature-difference, 

 on the assumption (which is practically without error for such small 

 differences) that the variation of height with temperature is a linear 

 one. The calculated density is a similar mean. But these heights 

 and densities are not made use of in calculating the values of the 

 " calculated " 7. It, too, is the mean of the found values (see p. 184), 

 and similarly the values of 7(Mv) s are calculated from the calculated 

 values of 7, and from the calculated densities. 



The molecular weight, computed by means of the equation given 

 on p. 187j for the whole range of temperature employed, is 148'6 

 instead of the theoretical mean 150-25. 



IV. Mixture of Chloroform and Carbon Bisulphide. 

 Here also equal molecular proportions were used. 



r = 0-01046 cm. 



As the value of k for this mixture points to association at low 

 temperatures, the mean molecular weight has not been calculated. 



