WORK OF P. B. DAVIS. 199 



SUMMARY. 



The following points have either been confirmed or brought out : 



1. Conductivity values in glycerol are extremely small, but show regular increase 

 with rise in temperature and, except in special cases, with dilution. 



2. In the cases of salts producing a marked lowering of the viscosity of the solvent, 

 a minimum in the conductivity curve of the concentrated solutions has been noted, 

 the conductivity varying directly with the fluidity. 



3. Conductivities in glycerol-water mixtures do not follow the law of averages, 

 but are always lower. 



4. Rubidium salts produce a phenomenal lowering of the viscosity of glycerol, 

 much greater than that of the corresponding potassium salts. 



5. Ammonium salts seem more closely allied to rubidium than to potassium in 

 their effect on the viscosity of a solvent like glycerol. 



6. The percentage increase in fluidity of the solvent produced by the dissolved 

 salt becomes less with rise in temperature and with dilution. 



7. Rubidium salts in pure glycerol show no tendency to produce positive viscosity 

 even at 75. 



8. Curves representing fluidity and conductivity in mixtures of glycerol and water 

 show marked similarity over the range of temperature studied. 



