NOTE. 



I would beg leave to refer the chemical as 

 well as the physiological reader particularly to the 

 analyses (in Note (27), Appendix) of the animal 

 tissues, which ought to have been referred to on 

 pages 43 and 126, and which at present are only 

 referred to in Note (7). Since the work was 

 printed, moreover, there has been added, at the end 

 of the Appendix, an interesting paper by Keller 

 (see page 325), confirming the very important ob- 

 servation of A. Ure, junior, as to the conversion of 

 benzoic acid into hippuric acid in the human body; 

 a fact which I perceive, by the Philosophical Maga- 

 zine for June, has also been confirmed by Mr. Gar- 

 rod, probably at an earlier period than by M. Keller. 

 The reader will perceive that this fact strengthens 

 materially the argument of the Author on the 

 action of remedies. 



W, G. 



