THE PHOTO-MICROGKAPHIC CAMERA 127 



The microscope is carried on an adjustable metal plate, which 

 allows of its sliding at right angles to the optical axis, hence 

 it can be moved out of position for any adjustment to be made 

 without interfering with the remainder of the apparatus. It 

 consists of two tables, both adjustable for height, one carrying 

 the camera and the other a triangular bar upon which all the 

 optical parts as well as the illuminant can be fixed, although in 



FIG. 46. Large Micrographic Camera. (Zeiss.) 



later forms the latter is supported on the table at the end of 

 the triangular bar. All the optical apparatus is carried on 

 saddles which may be adjusted and clamped in any position 

 on the triangular bar. The sole-plate carrying the microscope 

 also has levelling screws and elevating gear, so that any 

 microscope of less height than that for which the apparatus is 

 designed may also be used on it. The method of focussing 

 from a distance that is, from the position of the focussing- 



