4 CONTENTS. 



Page 



The Purity of the Fused Argentic Nitrate 55-63 



'I < -ts for Dissolved Air 55-57 



Tests for Retained Water 57-60 



Tests for Insoluble Impurities 60 



Tests for Ammonic Nitrate 61 



Tests for Nitrite 62 



Tests for Free Acid 62 



The Final Result and Its Relations to the Values of Atomic Weights of Nitro- 

 gen and Silver 64-65 



Summary 65 



THE MOLECULAR WEIGHT OF ARGENTIC SULPHATE AND THE ATOMIC WEIGHT OF 

 SULPHUR. BY T. W. RICHARDS AND GRINNELL JONES. 



Introduction 69 



Preliminary Experiments 72-74 



The Preparation of Pure Materials 74-75 



Sulphuric Acid 74 



Argentic Sulphate 74 



Hydrochloric Acid 75 



The Fusion of Argentic Sulphate 75-80 



The Conversion of Argentic Sulphate into Chloride 80-85 



The Final Results 86-87 



The Atomic Weight of Sulphur 87-88 



Summary 88 



