158 



BACTERIOLOGY. 



horizontal, the opposite extremities of the bars are easily released 

 from their sockets. The leg or support at this end can then be 



FIG. 79. REVERSIBLE MICRO-PHOTOGRAPHIC APPARATUS ARRANGED IN THE 

 VERTICAL POSITION. 



turned up and fixed underneath the apparatus by a button, and 

 the end of the apparatus itself gently lowered to the ground. 



