Proceedings. 41 



iodide and iodate ; but on concentrating the solution the 

 reversed action took place, free iodine being formed. Also, 

 on the addition of sodium iodate to a boiling solution of 

 sodium iodide and boracic acid, iodine was set free. 



Prof W. C. Williamson, F.R.S., referred to the recently 

 published report of the Royal Society Committee on the 

 Krakatoa eruption, and a discussion on the meaning of the 

 term "smoke" in the report ensued. 



Mr. William Thomson, F.R.S.E., F.C.S., read a paper 

 •on "The crystalline structure developed on ordinary glass 

 by the solvent action of fluorine compounds, with notes on 

 Prince Rupert's drops." 



Mr. P. Cameron read a paper on "The British species 

 of Allotrincs with descriptions of other new species of 

 parasitic CynipidcB." 



