CONTENTS. 



IX 



I 

 2 



3 

 4 



5 

 6, 



7 

 8 



9 



lO 



1 1 



12 



13 



14 



IS 

 1 6, 



'7 



PART III.— ON THE VOLUMETRIC COMPOSITION OF WATER. 



— Introduction .............. 8i 



— Method Employed 38 



— Volume, Temperature, and Pressure ......... 84 



— Voltameter for Producing and Weighing Electrolytic Gas ..... 85 



— Filling the Globes with Mixed Gasses ......... 86 



— Measurement of Pressure . . . . . . . ' . . . .86 



— Closing the Globes during the Analysis of the Gas ...... 87 



— Closing the Voltameter ............ 87 



— Preparing the Voltameter for a Following Experiment ..... 87 



— Eudiometric Analysis of Electrolytic Gas ........ 88 



— Difficulty of Preventing Entrance of Air into the Eudiometer .... 88 



— Leakage of Air between Mercury and Glass ....... 89 



— O.Kidation of Mercury — Large Eudiometer ........ 89 



— Can Electrolytic Gas be Obtained in Atomic Proportions? ..... 90 



— Observations on the Excess of Hydrogen ......•• 9' 



— Density of Electrolytic Gas, Observations ........ 9' 



— Reduction of Results ............ 92 



PART IV.— SYNTHESIS OF WATER FROM WEIGHED QUANTITIES 



HYDROGEN AND OXYGEN. 



I. — Introduction ....... 



2. — -Production and Weighing of Oxygen 



3. — Balance and Weighing on Reversal Apparatus 



4. — Manipulation of Tube Containing Palladium 



5. — Apparatus for Producing and Weighing Water 



6. — Manipulation in Setting together the Apparatus for Combustion 



7. — Manipulator for Regulating the Progress of the Combustion 



8. — Progress and End of the Combustion .... 



9. — Weighing the Oxygen after a Conibustion 

 10.— Weighing the Palladium after a Combustion 

 II. — Eudiometric Analysis of the Residue Left Uncombined 

 12. — Sources of Error ........ 



13. — Completeness of Drying Gases with Phosphorus Pentoxide 

 14. — Is Hydrogen Given off by Palladium Free from Water? 

 15. — Is Oxygen Absorbed by the Phosphorus Pentoxide Used? 

 16. — Results — Atomic Weight of Oxygen .... 



17. — Atomic Weight Computed from Density and Volumetric Ratios 



OF 



96 

 96 

 97 

 97 

 99 

 100 



lOI 



103 

 103 

 104 

 104 

 105 

 106 

 106 

 107 

 108 

 no 



Summary of all Published Results 



III 



