46 



A FEW CHEMICAL CHANcJES 



denoto the amount of aiiiyodalin solution recpiirod to decolour- 

 ise 2 oc. of Pavy's solution (25 ec.=O.Oir)l <y. ^^gH^^O^), at 



the speeitied times after the instant of niixiui;". The tempera- 

 ture at which the action took jdace was 18 ±0" ,5 C. 



Tahle III, 



Time in 

 hours. 



19 

 30 

 48 

 66 



Xo. of oc. of Aniygdalin sola- .t « * i 



tion rcquiied to decolourise 2 cc. ^o. of gram h of glucose per 1 



of Paws solution when acted on i "c. of Aniygdahn solution acted 



by 



Radium. 



11.54 

 13.39 

 14.77 

 16.27 



No Radii.m. 



12.08 

 12.29 

 12.28 

 12.39 



on by 



Radium. 



0. 000 104 

 0.000089 

 0.000081 

 0.000073 



No Radium. 



0.000099 

 0.000097 

 0.000097 

 0.000097 



From an examination of this table it will be seen that there 

 is a striking difference between the behaviour of solutions of 

 amygdalin acted upon by radium and those which have not been 

 so influenced. For the solutions that have l>een bombarded with 

 the radiations from radium, the content of glucose reaches a 

 maximum and then falls off again; but with the solutions not 

 under the influence of radium the amount of glucose present 

 increases with time and tlien remains constant. An effect sim- 

 ilar to this has been observed by the author^ when acid solutions 

 of potassium iodide made up with ordinary distilled water are 

 allowed to decomixDse in the sunlight or dark ; and when acid 

 solutions of potassium iodide made up with pure water (con- 

 ductivity 2.16 X 10 ), are allowed to decompose under the 

 influence of radium. In each of these cases the content of free 

 iodine reaches a maximum and then gradually falls off" again. 



It would seem that the effect of the radium is to cause the 

 glucose, in some manner, to change into some new product. In 

 the case of the solution of amygdalin which has not been under 



Loc. cit. 



