ON THE BOILING POINTS OF AQUEOUS SOLUTIONS OF ELECTROLYTES. 195 



had been raised again to the boiling temperature. When the boiling tube was in 

 position it was surrounded by a glass cylinder A, of larger diameter, the space between 



Fig. 1. 



being packed with asbestos wool, which reached to the height shown. The instrument 

 rested on an asbestos board H with a circular opening in its centre, covered by a sheet 



