ON THE HALOGEN HYDRIDES AS CONDUCTING SOLVENTS. 167 



In conclusion, we wish to express our thanks to Professor B. J. HARRINGTON, 

 Director of the McGill University Chemical Laboratory, and to Professor JOHN GIBSON, 

 of the Heriot Watt College, for placing facilities at our disposal and for kindly 

 interest taken in the work. Our thanks are also due to Professor JOHN Cox, 

 Director of the McGill Physical Laboratory, for the use of apparatus, and for kindly 

 supplying us with large quantities of liquid air. We also wish to express our thanks 

 to the Research Grant Committee of the Chemical Society for a grant made to one 

 of us, by means of which a large portion of the expense of the work of Part III. has 

 been met. 



