PATTY DEGENEEATION. 



19 



greasy scum on the surface of the putrefying substance, pene- 

 trating into it to a depth of several Hnes. They consume a great 

 deal of oxygen, which they obtain for the most part from the 

 proximate principles of the organic matter, thereby causing 

 their decomposition. We cannot allow them to be regarded 

 merely as products of putrefaction ; neither can their presence 

 upon the putrefying body be considered as purely accidental. A 



(1) Spores and mycelium of Bothrytis acinorum cultiva- 

 tion in an infusion of flesh, a. A recent spore; l. The 

 same after four hours; d. After forty-eight hours, both 

 covered with vibriones, ^i^j. (2) Yibriones set free in an 

 infusion of flesh from the mycelia of mucor, -^. (3) 

 Growth of yeast from germs of vibriones. a. Germs; 

 I, c, d. The same as vesicles which progressively increase 

 in size, ultimately forming the well-known cell-colonies of 

 yeast. (After Lildevs.) 



body may undoubtedly undergo decomposition in other ways as 

 well, but it can only '^ putrefy" with the aid of Bacteria. 



2. COXDITIOXS OF I^' VOLUTION. 

 A. Fatty Degeneration, 



§ 25. I have chosen to term the tissue changes, to which the 

 following paragraphs will be devoted, " conditions of involu- 

 tion," implying thereby that they agree in the association of a 

 gradual metamorphosis and final annihilation of normal structure, 

 with a corresponding diminution and final abolition of the normal 

 function of the affected parts. 



