Contribution to the Study of Hydroxvlamine.* — By G. 

 M. Johnstone MacKay, B. A., Dalhoitsie University, 

 Halifax, Nova Scotia. 



(Read 9fh April, 1900). 



The followiut{ investig^ation, carried out in the laboratories 

 of Dalhousie University, was undertaken at the suggestion of 

 Dr. E. MacKay. The chief object in view was the study of 

 solutions more concentrated than those investigated by W. H. 

 Ross.^ 



Preparation of Hi/droxylamine Sulphate. 



Considerable difficulty was found in preparing large quanti- 

 ties of hydroxylamine sulphate, and as about 600 grains were 

 required, a port"on of the salt used was purchased. 



The method adopted was that of Divers and Haga^ as 

 modified by Maxwell Adams,* which method appears to be more 

 satisfactory than the older methods. 



On looking over the literature on the subject, several con- 

 flicting statements were found. Thus Divers and Haga say 

 that the mixture to be sulphonated should consist of sodium 

 nitrite and sodium carbonate in the proportion of two molecules 

 of the former to one molecule of the latter ; Maxwell Adams on 

 the otiier hand, says one molecule of sodium nitrite to two of 

 sodium carbonate, while Lengfeld* gives more than two mole- 

 cules of sodium nitrite to one of sodium carbonate. 



All three pi-oportions were tried, but the two latter were 

 found to give no satisfactory result. Maxwell Adams' directions 

 probably contain a misprint, and should read " one part of sodium 



*Co\TRIBUriO\S FROM THE SCIEN'CE LABORATORIES OF DALHOUSIE UNIVERSITY 



-[Chemistry] 



1. Trans. N. S. Inst. Sci., XL I, 96. 



2 Jour. Chem. Soc (Lond.)69, 1C65 (1896). 



3. Am Chem. Jour. 28. 198, (19021. 



4. Inorganic Chemical Preparations. 



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