APPENDIX III. 209 



entire lens was taken for a single examination, 

 the faintest possible indications of lithium were 

 obtained. 



Another patient five and a half hours before death 

 drank lithia water containing ten grains of carbonate 

 of lithia. 



After death the cartilage of one joint and the 

 crystalline lens were examined. 



The cartilage showed lithium very distinctly. 

 When half the lens was taken for a single analysis, 

 only very faint traces of lithium could be found. 



When no lithia had been taken, seven cataracts 

 were examined most carefully, and one only showed 

 an exceedingly feeble trace of lithium. 



When twenty grains of carbonate of lithia were 

 taken twenty-five minutes before the operation, the 

 lens showed no lithium ; the same quantity taken 

 two and a half hours before, showed lithium in the 

 watery extract ; three and a half hours before, 

 showed lithium in each particle ; between four and 

 five hours before, the same ; seven hours before, the 

 same ; seven days before, not the slightest trace of 

 lithium. 



Thirty grains of carbonate of lithia, taken between 

 six and thirty- six hours before death, showed the 

 faintest indications of lithium in the lens. 



Ten grains of carbonate of lithia, taken five and 

 a half hours before death, gave only faint traces of 

 lithium in the lens. 



