88 



CKOONIAN LECTURES 



days, the guinea-pig probably re-dosing itself 

 from its own skin. 



The following table shows the rate of passage 

 of carbonate of lithia into and out of cataracts 

 in men : 



20 grains of carbonate of lithia were taken 



25 minutes before the operation No trace of lithium was 



found in the cataract. 



2^ hours Lithium in the watery ex- 



tract of the cataract. 

 Lithium in each particle. 



7 ,,5 hours 



7 



Traces in alcoholic extract 

 of ash. 



In alcoholic extract not 

 the slightest trace of 

 lithium. 



Slightest trace in the al- 

 coholic extract. 



In man after taking five grains, lithium was 

 found in the urine in from ten to twenty 

 minutes, and continued to pass out for eight days. 

 After a twenty-grain dose of carbonate of lithia, 

 the crystalline lens showed lithia in two and a 

 half hours. After seven days none was found. 



