BTAPHYLOCOQOUS PYOGENEs AUM-IS 131 



and this gradually advances deeper along the thrust-canal, 

 while, as the funnel-shaped liquid area enlarges, the cocci 



Liquefied part 

 Collection of bacterin 



Xit-dle-track in the 

 non-liquefied part 



Liquefied part of the 

 gelatine 



Mass of bacteria collected 

 at the bottom of the 

 liquid funnel 



I'n;. 38. THRUST-CITI/I-UHES ix GEI.ATIXK OF STAPHYL<>< -<>< < us I-Y<MJKXRS AUISKI .- : 



TWO DIFFKltKN'T I-'OUMS OF GItO\VTII. 



sink to the bottom and begin to take on colour (fig. 38). 

 When, however, the culture is exposed, not to ordinary tern- 



