New Illuminator for the Microscope. By J. IV. Gordon. 419 



Fig. 71— Plan. 



A. Bed of the instrument. 



B. Milled head for raising and de- 



pressing the lamp. 



C. Lamp-chamber. 



D. Circular plug for carrying the 



lamp-socket. 



E. Lamp-socket. 



F. Central support by which the 



lamp-chamber and speculum are 

 carried. 



G. Back by which the lamp-chamber 



is moved backward and forward 

 to vary the brightness of the 

 light. 

 Milled head for enabling the 

 observer to operate the rack. 



II 



K. Tube for screening the interior of 

 the lamp-chamber from the view 

 of the observer at the Micro- 

 scope. 



L. Plate carrying the speoulum 

 mount. 



M. Speculum mount. 



N. Tube carrying the mount for the 

 bullseye. 



0. Bullseye mount. 



P. Plug for connecting up to electric 

 circuit. 



R. Plug for connecting lamp to 

 electric supply. 



S. Switch. 



lU ' ll H I JrtlT l " 



Fig. 72. —Side Elevation. 



(The reference letters to Fig. 71 also indicate the same parts in this diagram.) 

 T. The collapsible pillar. V. The brake. 



2 F 2 



