346 A slimf: bacterium from tiir peach, etc., 



The rods are devoid of motility, and no flagella could be detected. 

 The spongy rods are decolorised in places by the Gram method. 

 The spores are central and oval, and measure 1 : 1*5 /i; germination 

 is polar. 



Temj^erature, &c. — The bacillus grows equally well at 30° and 

 37'', at 15^ and 22° the growth is less. It is aerobic and does 

 not grow under anaerobic conditions such as beneath a mica 

 sheet in plate culture. 



Nutrient agar plate. — The colonies in 24 hours at 30"^ are 

 white, raised, dry and rounded. Microscopically they are clouded 

 and hatched. The deep colonies are opaque, irregular and fibrous. 

 Upon the second day the margin of the colony has become 

 puckered, and microscopically the colonies appear granular, with 

 a margin like a yeast colon3\ 



Saccharose-potato agar plate. — At 22'^ the colonies are in 48 

 hours translucent white and raised. They become white, appear- 

 ing like drops of flour paste, and when free to grow soon reach a 

 centimetre in diameter. Microscopically the translucent white 

 colonies are either clouded or opaque. The deep colonies are 

 irregular and opaque. 



Nutrient gelatine plate. — The colonies consist of a white felted 

 or floccose mass in a crateriform liquefied area. The deep colonies 

 are irregular, rough and opaque. 



Nutrient agar stroke. — The growth is raised, white or buff- 

 white, dry, glistening or fatty, lobular and rough, with micro- 

 scopic puckerings. It becomes broad and translucent, the rough- 

 ness disappears and the culture becomes flat and speckled. The 

 edge is at first smooth, but becomes ciliate and the medium 

 darkens. 



Saccharose-])otato a(/ar stroke. — A very luxuriant white or dirty 

 white slime is formed. It slowl}- gravitates, generally producing 

 vertical furrows. At 22*^, and when recently isolated, the growth 

 may show a sausage-like, wisp-like or wrinkled structure which 

 becomes homogeneous. 



Nutrient gelati^ie stab. — The growth is faint and filiform below^ 

 with a tubular liquefied area above and an air bubble at the top. 



