1865.] info and out of the Vascular and Non-vascular Textures. 413 



In ten minutes lithium very distinctly present in one drop of the urine. 



Four days afterwards traces of lithium still in the urine. 



Five days afterwards slight traces in one-eighth of an ounce of urine 

 when evaporated. 



In six days afterwards no lithium perceptible in the urine. 



Experiment 8. Twenty-five grains of chloride of lithium were dissolved 

 in one gallon of water, and the feet and ankles of a man were kept in the 

 solution for two hours ; at the end of this time the urine was passed and 

 examined for lithium, and no trace could be found in the aqueous extract 

 of the ash of one quarter of an ounce of urine. 



These experiments agree very closely with some which I made many 

 years since on a full-grown German who had an open bladder, admitting 

 the urine to be caught as it came from the kidneys. 



Feb. 24, 1852. At 8.45 A.M. he took two cups of black coffee and 

 nothing else. 



9.30 to 9.50. Urine was caught, and it contained no trace of iron. 

 9.50. Protosulphate of iron, 6 - 7 grains, free from persulphate was taken 

 in two ounces of distilled water. 



9.55. Urine caught and contained no iron. 



1 0. No iron as peroxide. Present as protoxide. 

 10.5. Slightest trace of peroxide. Protoxide distinct. 

 10.10. Slightest trace of peroxide. Protoxide distinct. 

 10.20. Slightest trace of peroxide. Protoxide less distinct. 

 10.30. ,, Protoxide less distinct. 

 10.40. ,, Slightest trace of protoxide. 



11. No trace. 

 11.10. No trace. 



Feb. 26. The same patient. At 8 A.M. two cups of black coffee and 

 nothing else. 



10.20 to 10.30. Urine caught and no trace of iron found. 



10.30. Sulphate of protoxide of iron four grains, given in one ounce of 

 distilled water. 



10.31. No trace of iron in the urine. 



10.34. No trace. 



10.35. No trace. 



10.36. No trace. 



10.37. Slightest trace of protoxide of iron in the urine. No peroxide. 

 " 10.39. No trace. 



10.40. No trace. 



March 2nd. The same patient. At 8 A.M. two cups of black coffee and 

 nothing else. 



9.34 to 9.40. Urine collected and no trace of iron found. 

 9.40. Sulphate of protoxide given, seven grains in two ounces of dis- 

 tilled water. 

 9.42. None. 



