TRANSACTIONS 



OF THE 



Jlobi^ rSrotmn institute of Science. 



SESSION OF 1911-1912 



Ox THE BeBUlVIOUE of IeOX SaLTS, IX THE PeESENCE OF 



Albumens and Othee Oegaxic Substances, Towaeds 

 Ceetain Eeagents. — By Hexey Jeemaix Maude Ceeigh- 

 TON, ]\I. A., M. Sc, De. Sc, Lecturer on Physical Chemis- 

 try, Dalhoiisie UniTersity, Halifax, X. S." 



I. IXTEODUCTIOX. 



In tlie course of another investigation, it was observed by 

 the writer that, nnder certain conditions, solutions of soluble 

 Prussian blue were decolorized bj white of egg. As the 

 writer was unable to obtain any satisfactory information regard- 

 ing this behaviour, the present investigation was carried out 

 with a view of throwing new light on the associations of iron 

 with native and derived proteins. 



The prevention of many reactions by the presence of certain 

 organic substances is well known. Por example, the precipita- 

 tion of ferric and aluminium hydroxides is prevented by the 

 presence of small quantities of non-volatile organic acids, nota- 

 bly tartaric acid^, of sugar, of glycerine, and of other organic 

 substances. The cause of this is to be found in the formation 



* Contributions from the Science Laboratories of Dalhousie University — 

 [Chemistry]. 



1. Staedeler and Krause : Jahresb., 746, (1854). 

 Proc. & Trans. N. S. Ixst. Sci., Vol. XIIL Tra.vs. 5. 



(61) 



