XXV111. ABSTRACT OF PROCEEDINGS. 



whereas the platinum salt of choline contains 31*65 per cent. 

 The platinochloride, crystallised from water over sulphuric 

 acid, consists of anhydrous orange coloured plates and 

 prisms and melts at 217-218° O. (uncorr.) with decom- 

 position; according to Henry, "The Plant Alkaloids," choline 

 platinochloride melts at 215-240° C. with decomposition. 

 This basic substance, the hydrochloride of which crystallises 

 in monoclinic crystals, is thus apparently the parent sub- 

 stance from which the trimethylamine is obtained. 



Remarks were made by Mr. Maiden, Prof. Robinson and 

 the President. 



exhibits : 



1. Acid Silica Gels, by W. J. Clunies Ross, b.Sc. 



Specimens were exhibited to show the power of a small 

 quantity of a solution of silicate of soda to gelatinize a 

 large quantity of various acids. Gels were shown produced 

 by hydrochloride, sulphuric, nitric, acetic, phosphoric, 

 tartaric, oxalic and formic acids. Also gels coloured by 

 copper, iron, manganese and cobalt respectively. 



2. Mr. R. T. Baker exhibited old wooden water pipes 

 from London and Sydney. Remarks were made Mr. L. 

 Hargrave. 



