BACTERIOLOGICAL APPARATUS 



63 



sury. The amount of equipment required by the practitioner 

 to do such bacteriological work as is necessary to be done 

 immediately is not large. This is gratifying, for it is desir- 

 able to take into actual practice as many methods for accu- 

 rate determinations as possible. 



Pig. 30. Koch safety burner for heating incubators. 



B 



Fig. 31. American make of the Roux bimetallic thermoregulator. 



