PREFACE. 



THE first part of this little treatise was written and 

 printed as the introduction to my " Researches intended 

 to promote an Improved Chemical Identification of 

 Diseases," which have been published in several 

 numbers of the annual " Report of the Medical Officer 

 of the Privy Council." It has been found so useful in 

 my experience as a teacher, that I have, with the 

 permission of Mr. Simon, ventured to reproduce it in 

 the present form. It is a complete but concise epitome 

 of the branch of science commonly termed " physio- 

 logical or animal chemistry," and will be found to 

 contain its latest acquisitions. Any medical student 

 who possesses the information which it contains will 

 be enabled to meet the requirements, so far as concerns 

 this particular subject, of any of the examining and 

 licensing bodies in this country and abroad. To the 

 student in Chemistry, Physiology, or Science, it offers 

 a ready help to the acquisition of elementary know- 

 ledge, upon the basis of which he can afterwards place 

 the superstructure of more extended and detailed 



13555 



