i84 



MICRO-ORGAXIS^IS AND DISEASE [chap. 



appear after sixteen to eighteen hours as small greyish dots ; 

 ^vhen looked at under glass they are irregular in outhne, 

 possessing longer or shorter angular filamentous projections. 

 These are composed of motile bacilli and are the forerunners 

 — swarmers— for further outgrowths, so that after twenty-four 

 hours or later many neighbouring colonies are connected by 

 these filaments and coalesce, the older colonies showing rapid 



Fig. 57. 



-Film Specimen from a Colony of Protei's Vl-lgaris. 



liquefaction. In stab culture, already after twenty-four 

 hours liquefaction is pironounced in the upper parts of the 

 stab, which considerably increases during the next day, by 

 which time a funnel-shaped, liquefied, translucent mass 

 occupies the original line of inoculation ; the liquefied 

 gelatine being fairly translucent, at the bottom of the liquefied 

 mass IS seen a floccular, granular, white precipitate. On the 



