294 On Cutaneous Absorption. 



yellow tinge, and was transparent. The sulphat of 

 iron added to it produced no change in the colour. 



EXPERIMENT VIII. 



To satisfy myself what allowances should be made 

 for the increased action of the blood-vessels induced by 

 the bath, in accounting for the deep colour of the urine, 

 I placed myself, March 30th, in a bath of pure water, at 

 a comfortable temperature. I remained in it three 

 hours. My pulse, on my entering the bath, was about 

 72 in a minute. At the end of the first hour it 

 beat 67, at the end of the second hour, 62, and at the 

 end of the third hour, 62. Four hours after leaving the 

 bath, my pulse was 80 in a minute ; but I had very 

 slight languor and no head- ache. In this, as in former 

 experiments, I ate a full meal, and took a walk soon 

 after coming out of the bath. 



Urine was discharged at the time of my going into 

 the bath, at the time of my leaving it, and at the diffe- 

 rent intervals of 3, 5, 8, and 17 hours afterwards. 

 The urine drawn at the time of leaving the bath was a 

 little paler than either of the other portions, and was 

 much more abundant. The other portions were 

 scarcely distinguishable, by their colour, and in neither 

 of them could the red tinge be at all perceived. Test- 

 ea with the sulphat, these different portions exhibited 

 no change of colour, or rather they exhibited nothing 

 of the purple, or the brown. A large proportion of the 

 sulphat produces a slight change in the appearance of 

 common urine. I have occasionally seen a semi- 



