130 ARRANGEMENT OF APPARATUS. 



tion assumed during the manipulation necessary for 

 the process last described. 



The stand is placed in the horizontal position by 

 the removal of the camera legs ; all the instruments 

 are detached from it and carefully put aside; the 

 side boards are changed from their original position 

 and shifted two bolts lower down, or till flush with 

 the extremity of division No, 3, and firmly screwed 

 on. This keeps the two last divisions perfectly rigid, 

 and enables us to fold division No. 1 under them ; 

 where it also is firmly secured by one or more of the 

 binding screws, running in the slits with which the 

 centres of Nos. 1 and 3 are furnished. 



Thus folded up and tightly secured, the stand is 

 placed, with the platform for the microscope in front, 

 on the stand forming the floor of the recess. 



The ruby lamp is now lit in the dark room, and 

 all necessaries (such as developing solutions, dry 

 plates, dishes, etc.,) examined and put in their pro- 

 per places. 



The microscope lamp or Swan's electric light, the 

 former being preferred witti the power, we are about 

 to use, is got ready and placed on the stand. The 

 microscope with eye- piece attached being fixed in 

 position, the centring is carried out by a low power 

 objective as before described. All these manipula- 

 tions are performed by the hands through the 

 sleeves, or better through the windows in the same 

 position. These windows should of course be cap- 

 able of subsequent closure by sliding doors. The 

 sleeves were only mentioned on account of being 



