44 THE ROYAL SOCIETY OF CANADA 



times with ethyl acetate and dried to constant weight. A light 

 yellow solid was obtained. 



The filtrate containing the part soluble in ethyl acetate was 

 evaporated under suction at room temperature with the exclusion of 

 direct sunlight, as this solution, if exposed to light and air, becomes 

 black in colour. The solid obtained was partially redissolved in 

 ethyl acetate, filtered and evaporated as before to constant weight. 

 It has a varnish-like appearance and on scraping off the dish and 

 grinding, was a brownish-yellow powder. 



Analysis of Compound Soluble in Ethyl Acetate 



.2500 .0990 21.34 



%C %H %I %0 



Calculated for C25H40O8I 50.42 6.72 21.34 21.59 



Found 50.36 6.76 21.34 21.54 



No solvent could be found for the compound insoluble in ethyl 

 acetate and as it was obviously impure it was set aside and will be 

 investigated later. 



Interpretation of Results 



The results of the experiments just described seem to receive an 

 adequate explanation by the following: 



