234 GOLD IN SCIPZNCE AND IN INDUSTRY. 



comparatively few solutions will be found which even approximate 

 to this ideal perfection. But it appears to me that the study of the 

 problems of the liquid and the dissolved states may be much simpli- 

 fied by the recognition (1) that the primary physical properties of 

 liquids and solutions are due to the fact that they are assemblages 

 of molecules endowed with the amount and the kind of kinetic energy 

 which is proper to their temperature; and (2) that as these primary 

 physical properties of the liquid and dissolved states may be masked 

 and interfered with by chemical affinity, they should be studied as 

 far as possible in examples where the influence of this force is either 

 absent or at a minimum. 



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