1030 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



photographic objective. The objective may be replaced by an adapter, 

 which acts as a light-proof connection with the Microscojio when the 

 latter is tised. The liglit from the illuminating apparatus is transmitted 

 through a circular opening in the base-plate ; and the Microscope is 

 screwed to the base by three adjustment-screws, so that the tube is 

 vertically above this opening and vertically below the centre of the 

 camera. The whole apparatus is placed on a strong wooden table. The 

 illuminating apparatus is attached to the upright shown in the figure, 



Fig. 175. 



and can be adjusted as required. The mechanism for moving the fine- 

 adjustment is described in the next note but one. The camera can be easily 

 used in a horizontal position. For this purpose the base-plate is hinged 

 to the table on the right-hand side, so that it can be inclined along a 



