44 



APPLIED BACTBRTOLOGy 



effected by a small stream of water which runs con- 

 tinuously through the apparatus in one of three directions, 

 the choice being automatically determined by a thermo- 

 static capsule. 



On the top of the apparatus is a lever plate and lever, M, 

 similar to the one usied in the lamp incubator already 



Ilk - ill 





fia. 8. — Inodbatoe Heated by a Lamp. 

 described, only in this case the damper is dispensed with. 

 A bracket screwed to this plate supports a vertical shaft, 

 pivoted on centres at the top and bottom, which carries a 

 horizontal tube, C. 



In the incubating chamber is a capsule in a holder, sup. 

 ported by a tube screwed to the lever plate. 



