58 DAYj ON CHEMISTRY RELATING TO PHYSIOLOGY, &C. 



and which promises to afford important results in the hands 

 of future observers, who will now have the advantage of 

 being armed with an ingenious contrivance for the bringing 

 up of deep soundings, for which naturalists are, we believe, 

 mainly indebted to the ingenuity of Dr. Wallich. 



Chemistry in its Relations to Physiology and Mediciiie. 

 By George E. Day, M.D. Loudon : Bailliere. 



Although the science of physiology cannot be fully com- 

 prehended, unless studied in connection with the organs which 

 perform the functions of life, there can be now little doubt of 

 the vast importance to be attached to the chemical constitu- 

 tion and changes which the organs of living bodies undergo. 

 In fact, the great development, in recent years, of physiological 

 science has been in the direction of chemical inquiry. It is 

 the object of Dr. Day, in this book, to set forth more par- 

 ticularly the relations of chemistry to physiology ; and he has 

 produced a work of great practical value. We have been 

 previously indebted to him for having translated Simon's 

 work on ' Animal Chemistry' and Lehmann's ' Physiological 

 Chemistry,' and no one could be better fitted for gi^ang a 

 view of the whole subject than Dr. Day. But whilst it is 

 easy to separate the chemistry of life from an}^ detailed ac- 

 count of the morphology of the organs of living beings, it 

 is impossible to treat this subject satisfactorily, without 

 describing the histological structure of the organs and 

 secretions. Hence the necessity for the use of the microscope, 

 and the examination by its aid of the various tissues and 

 secretions. Whilst, therefore, writing a book expressly 

 devoted to the chemistry of life. Dr. Day has felt himself 

 compelled to refer constantly to the nature of those living 

 products which can only be detected by the aid of the micro- 

 scope. The work is accompanied by five plates, illustrative 

 of the microscopic structure of the crystals and histological 

 elements found in the blood and secretions. These illustra- 

 tions are got up in the style of those published in Funk's 

 ' Physiological Atlas,' and Avill be found of great value to the 

 student who is beginning to work at this subject. 



Dr. Day has divided his work into three great heads or 

 departments : 1, The organic substrata of the body; 2, The 

 chemistry of the animal juices and tissues ; 3, The great zoo- 

 chemical processes. It is in the second part more particidarly 



