C— PHYSJCAL CllKMlSTllY AND VETElllNARY SCIENCE. 

 By Waltkk Frki, M. Vet. D. 



T. IXTIJODUCTION. 



The application of phy-^ical and physical chemical theories and 

 nietho<Is to the study of lixing matter owes its origin to a feeling that 

 a better explanation of vital phenomena was necessary than that current 

 up to the present. The enormous progress of physictil chemistry < luring 

 the last thirty years has induced biologists to apply these results to 

 tlieir methods. But the piesupposition of these applications is always 

 the belief that physical and physical chemical analj'ses of life are nijt 

 impossible. 



The experiments on this line were successful, and have thrown 

 nuich light on the physiological and pathohjgieal conditions of life 

 phenomena. 



Tn the following paper I give — 



(1) A general review of the most important results of physical 



chemical methods in biology. 



(2) Special reference to the pathology of animal diseases. 



It is not my intention to treat the first part of the subject com- 

 pletely, as the facts are so manifold and the science so rapidly increasing 

 tliat I can only explain the general leading principles and ideas. 



If we start physically analysing, for instance, a mammalian or- 

 ganism, we see first of all that the (|uantitively prominent part is 

 foi-med by liquids : — 

 (i) Blood. 



(ii) Lymph and serous litjuids — 

 Pericardial li([uid 

 Pleural liquid 

 Peritoneal liquid 

 Cerebrospinal li(|ui<l 

 (iii) Secreta* — 

 Mucous 

 .Saliva 



Stomach juice 

 Pancreas juice 

 Bile 



Intestinal juice^ 

 Spermal Hcjuid] 

 Amnios liquid - Sexual organs 

 Milk I 



(iv) Excreta — 

 Urine 

 Perspiration. 



* Tlie products of the so-called internal secretions of testicles, thyrcoidea, 

 suprarenal glands, &c. , are not mentioned, hetause they are not collected in 

 special tubes, but go " backwards '" into the lyiiipli or blood. 



Digestive organs 



