TABLE OF CONTENTS 



PAGE. 



Introduction I 



The Aim and Scope of the Present Research 8 



The Values of the Constants 9 



The Density of Amalgams 11 



The Purity of the Materials 15 



Precautions Used in the Preparation of Amalgams 17 



The Cell and Its Manipulation 21 



The Potentiometer and Its Calibration 23 



The Standard of Potential 28 



The Electromotive Force between Zinc Amalgams 30 



Influence of the Concentration of the Electrolyte 44 



The Electromotive Force between Cadmium Amalgams 46 



The Temperature Coefficient of Amalgam Cells 49 



The Measurement of the Heat of Dilution of the Amalgams 51 



The Application of the Equation of Helmholtz 57 



The Application of the Formula of Cady 58 



The Probable Causes of the Deviations 59 



The Application of the Gas Law at Infinite Dilution 65 



Summary 68 



ILLUSTRATIONS 



PAGE. 



Fig. I. The Densities of Zinc and Cadmium Amalgams 14 



2. Device for Preserving Amalgams 19 



3. A Rack with Pipettes 20 



4. Amalgams in Cell ready for Potential Measurement 22 



5. The Potentiometer 24 



6. The Preliminary Results with Zinc Amalgams 36 



7. The Final Results with Zinc Amalgams free from Oxidation 45 



8. The Results with Cadmium Amalgams 49 



9. The Apparatus for Measuring Heat of Dilution 53 



10. The Approach to the Gas Law at Infinite Dilution 66 



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