Hyponitrites ; their properties and their pre- 

 paration by sodium or potassium. 



By 



Edward Divers, M. D., D. Sc, F. R. S., Prof., 

 Imperial University, Tokyo. 



The hyponitrites Lave received the attention of many 

 chemists besides myself since their discovery in 1871, and even 

 this year new ways of forming them and the new working of 

 an old method have been pnblished. Yet much has been left 

 to be put on record before a fairly correct and full history of 

 these salts can be said to have been given, and the present 

 paper is meant to be the necessary supplement to what has 

 l)een already published. 



Ways of forming hyponitrites- 



No writer npon hyponitrites in recent years has shown 

 himself acquainted with all the ways there were then known of 

 getting these salts, or Avith even the most j)roductive among 

 them. The following complete list is valuable therefore, and 

 is of special interest as bringing together the various ways in 

 which these salts have their origin. 



1. Reduction of an alkali nitrite by the amalgam of its 

 metal. (Divers, 1871). 



