INFLAMMATION. 427 



If we apply iodine to sections of such glands as these, 

 all the diseased parts become coloured red, whilst every 

 part that retains its normal structure merely becomes 

 yellow. The capsule, which consists of connective tissue, 

 the fibrous trabeculse between the follicles, the delicate 

 intrafollicular network which separates the different cor- 

 pora amylacea, and lastly those follicles which contain 

 normal cells, remain yellow. All the other parts assume 

 the iodine-red hue. If we add sulphuric acid, these parts 

 become of a dark reddish brown, or violet red or if one 

 hits the mark, pure blue * but if there are still nitro- 

 genous particles present, the colour becomes green or 

 brownish red. 



Now, gentlemen, that we have established the classifi- 

 cation of morbid disturbances generally according to the 

 difference of action in the tissues, I think of treating 

 more in detail of the process, which the practical physi- 

 cian, according to the ordinary mode of speaking, most 

 frequently meets with, namely inflammation. 



Our notions of inflammation have undergone an essen- 

 tial change in consequence of the observations, of which 

 you have now heard a certain part. Whilst until quite 

 recently it was the custom to look upon inflammation as 

 a real entity, as a process everywhere identical in its 

 essence, after I made my investigations no alternative 

 remained, but to divest the notion of inflammation of all 

 that was ontological in it, and no longer to look upon 

 the process as one differing in its essence from other 

 pathological processes, but only to regard it as one differ- 

 ing in its form and course. 



In the descriptions given of inflammation by the old 

 writers as preserved to us in the dogmatical writings of 

 G-alen among the four cardinal symptoms (calor, rubor, 

 tumor, dolor) heat is, as is well known, the most promi 



