VI PREFACE TO THE G SUM AN EDITION. 



consist of isolated, purely chemical or analytico-chemical problems, 

 but that always, as far as possible, it should go hand in hand with 

 the study of the different chapters of chemical physiology. 



The study of physiologico-chemical processes within the animal 

 body must precede the study of its component parts, its fluids and 

 tissues; and this latter study, according to my experience, will then 

 only inspire true interest if the study of the physiological signifi- 

 cance of those component parts be closely pursued in connection 

 with that of the transformations which take place in these fluids 

 and tissues. 



In view of this arrangement of subject-matter, and in order to 

 render my book of greater interest and utility to those who do not 

 wish to take cognizance of its analytico-chemical part, I have dis- 

 tinguished the latter by different setting of the type. With the excep- 

 tion of urinary analysis, which practically is of particular impor- 

 tance and which has been treated somewhat elaborately, this part in 

 general depicts only the main points in the methods of preparation 

 and of analytical methods. The instructor who superintends the 

 laboratory practice and who chooses the problems for work has 

 ample opportunity to give the beginner the necessary advanced 

 directions, and for the more experienced student, as well as for the 

 specialist, the excellent works of HOPPE-SEYLER, NEUBAUER-HUP- 

 PERT, and others render more explicit directions superfluous. 



HAMMARSTEtf. 

 UPBALA, October, 1890. 



