FHOTOGBAPHV OF BACTERIA. 



157 



in the vertical position, while the iUomination is sapplied from an 

 oxrfaydiogirai lantern. 



To place the apparatus in the vartical position two small hinged 



taackets, at the end distant from the camera, are forced up with 

 .a smart blow ci the hand. The corresponding ends of the stretcher 

 bars are dislodged from their fittings, and allowed to descend ; when 



