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. — Rbveksible Micko-photogeaphic Appabatus akeangbd 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. 



