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THE ROYAL SOCIETY OF CANADA 



pentoxide and charcoal in a stream of chlorine, and is usually reddish, 

 due to small quantities of the tetrachloride. This impurity may be 

 removed by rectification with sodium in a current of carbon dioxide, 

 but for our purpose this was not essential. Pure vanadyl chloride is 

 bright lemon-yellow coloured liquid boiling at 126°C. On exposure 

 to moist air it decomposes quickly. 



In depositing the metal, a convenient amount of the chloride is 

 placed in the flask E, shown in Figure 1, with a stopper carrying two 



Fig. 1. 

 tubes A and B, and two heavy copper leads holding the platinum 

 "fillet" D. An air pump is connected to A, and dry hydrogen is 



