14 PHOTOMICROGRAPHY 



rigidly at the desired height, their position limits the 

 range of motion. The baseboard is screwed to a wall 

 at such a height that the focussing screen is easily ac- 



Fig. 4 



REFLEX VERTICAL CAMERA 



cessible, the microscope and illuminating system being 

 placed on a low table or box. The position of the focussing 

 screen in reflex cameras is a great point in their favour, 



