250 MICRO-ORGANISMS AND DISEASE [chap. 



tinous, grey, irregularly outlined, angular, minute patches ; 

 in the stab culture in gelatine after two or three days a very 

 characteristic growth is noticed : the stab is a translucent 

 grey line from which branch out horizontally vast numbers 

 of fine, closely placed, gelatinous, translucent grey threads ; 

 in the streak culture the streak becomes visible after two to 



•^2^ 



'f 



Si!» 



^y^ 



Fig. 92 —Film Stecimek of I!lood of Mouse dead of Koch's Mouse 

 Septic.-emia. 



three days as a gelatinous, grey, translucent, thin band from 

 which pass out vertically numerous grey fine lines. The 

 growth liquefies the gelatine very slowly ; it takes generally 

 some days before liquefaction commences, and it proceeds 

 very slowly ; the gelatine is thick like syrup, is fairly limpid, 

 but contains greyish, translucent flakes. In Agar mi.xturc 



