IN WSKASES. 



entirely within the department of inorganic chemistry, or will be 

 found in the descriptions of the methods of zoo-chemical invcsti.r a - 



on, considered in different parts of this work. Those who are 



tamihar with zoo-chemistry need hardly be referred to the copious 



onographs on urinary calculi with which our literature abounds 



the practical physician should in this case, as probably in 



many others, be disappointed in not finding in these volumes all 



b he had been led to anticipate from the importance attached to 



the facts derived from pathologico-chemical inquiry, he must 



remember that the newly sown seed cannot at once blossom and 



ear fruit, and that years must pass before the anticipated harvest 

 can be reaped. Truly scientific, physiological, and pathological 



amlts can only be deduced from the study of physiological pro- 

 cesses, of which we propose to treat in our third volume. 



We ought, indeed, in accordance with the entire plan of this 

 work, to enter fully both into the consideration of the origin of the 

 urinary constituents and the physiological importance of the urinary 

 secretion ; but we abstain from doing so, because the subjects here 

 referred to will either be treated of in our remarks on Histo- 



lemistry (the chemical theory of the tissues), or fall so entirely 

 within the department of the chemical and mechanical metamor- 

 phosis of matter, that we must defer their consideration until we 

 enter upon the study of that subject. 



END OF THE SECOND VOLUME. 



VOL II. 2 H 



