xxx Proceedings. [March 26th, ipoy. 



the new compound on evaporation. It crystallises in straw- 

 yellow plates, is not volatile, and decomposes on heating with 

 slight explosion ; it is very stable towards reagents, and is not 

 attacked in the cold by strong caustic alkalies, alkali sulphides, 

 or by nitric, hydrochloric or sulphuric acids. It is not further 

 acted on by magnesium methyl iodide. On boiling for several 

 hours with silver hydroxide in a moist mixture of benzene and 

 acetone, it is converted into trimethylplatinimethyl hydroxide, 

 (CH 3 )„Pt.OH. This substance is insoluble in water, gives no 

 alkaline reaction with litmus, and crystallises in colourless 

 rhombic dodecahedra belonging to the cubic system. 



Trimethylplatinimethyl nitrate, (CH 3 ) 3 Pt.N0 3 , obtained by 

 dissolving the hydroxide in nitric acid, crystallises in colourless 

 plates and is freely soluble in water. On adding an alkali 

 chloride to its aqueous solution, trimethylplatinimethyl chloride, 

 (CH 3 ) 3 Pt.Cl, is precipitated. This salt crystallises from chloro- 

 form in colourless rhombic dodecahedra belonging to the cubic 

 system. In a similar manner a number of other salts have been 

 prepared, including the bromide and the cyanide; the latter is 

 hydrolysed on heating with caustic potash with evolution of 

 ammonia. 



Ordinary Meeting, April 9th, 1907. 



Mr. Arthur McDougall, B.Sc, in the ("hair. 



The thanks of the members were voted to the donors of the 

 books upon the table. The following were among the recent 

 accessions to the Society's Library: — " Reports of the Aledite?- 

 ranean Fever Commission, Part j" (8vo., London, 1907), pre- 

 sented by the Royal Society of London ; " A Chemical Conception 

 of the Ether" by D. Mendeleeff (8vo. , London, 1 904), presented by 

 Dr. Henry Wilde, F.R.S. ; " Preliminary Report on the Rossland, 

 B.C., Mining District? by R. W. Brock (8vo., Ottawa, 1906), 



