222 APPENDIX III. 



sulphate of thallium, and it was killed in six hours. 

 The aqueous extract of the lens showed thallium 

 faintly. The urine showed the thallium distinctly. 

 The aqueous extract of the two large nerves showed 

 no thallium. 



On the Passage of Sulphate of Silver into the Textures. 



A guinea-pig was given one-eighth of a grain of 

 sulphate of silver. Twenty-three hours afterwards 

 it was given another eighth of a grain. Twenty- 

 seven hours afterwards a third eighth of a grain was 

 given; and the same dose on the third, fourth, 

 fifth, sixth, seventh, ninth, and tenth days ; on the 

 eleventh day the animal died. One grain and a 

 quarter of sulphate of silver in twelve days was 

 taken. The ashes of the liver, kidney, and stomach 

 showed silver fairly, by means of galvanic precipita- 

 tion of silver or copper. The ash of the bile showed 

 silver rather less distinctly. The ash of the urine 

 showed the silver only very slightly. The ash of 

 the lenses showed only very slight traces of silver, 

 and the ash of the brain showed none. 



On the Passage of Chloride of Strontium into the 

 Textures. 



Two guinea-pigs, which had been given no stron- 

 tium, had the whole kidney, liver, and lenses 

 examined for strontium, but no trace of it dould be 

 found. 



A guinea-pig was given four grains of chloride 

 of strontium ; in seven hours it was killed. The 



