xvi AUTHOR'S PREFACE. 



require of this work more than the present state of the science 

 will enable me to present him with. He will find in it che- 

 mical facts which the physiologist and pathologist may render 

 of farther service : the few scattered ideas concerning the me- 

 tamorphosis of the bloody and the probable connexion between 

 various diseases and certain modifications in the composition 

 of the diff'erent animal fluids, may serve as connecting links for 

 further investigations. 



The materials for my analyses have been chiefly derived 

 from the Charite (hospital) of this city, from some of the public 

 cliniques, from private practice, and from the royal veterinary 

 school. I gladly avail myself of this opportunity of publicly 

 expressing my thanks to Drs. Schonlein, Wolff", and Romberg, 

 as well to Professors Gurlt and Hertwig, and the other pro- 

 fessional friends who have favoured me with their advice and 

 assistance. I must likewise express my obligation to Dr. 

 V. Behr, who assisted me for a considerable time in my re- 

 searches on the urine. 



That this work may succeed in encouraging a taste for a 

 department of science, whose cultivation and further develop- 

 ment is, at the present time, imperatively demanded by the 

 medical public, is the most sincere wish of 



The Author. 



Berlin, April 1842. 



