37 



2(1. 



Fig. 14. Large Mechanical Stage, No. 44. 



: lever for securing the lower sliding piece; 6.- clamping screw to arrest 



the turning movement. 



(% Full Size.) 



no longer follows; the stage is then pressed gently forward, raising the hinder 

 part first and then lifting the stage out of its centring appliance. It should be 

 observed that, in inserting another stage, the spring steel pin, housed in front 

 part of the bed, engages in the groove situated in the turning ring of the stage 



proper. 



i 



The stages Nos. 44 and 45 may be inserted into the centring 

 appliance in the Stands I, III and IV and can, forthwith, be inter- 

 changeably used one after the other. 



*Photo- micrographic Stage. For photo - micrographic and projection 

 purposes it is particularly desirable to be able to impart a very slow motion to 

 the object and simultaneously to rotate the stage round the optical axis of the 

 microscope. Both these requirements are met by our photo-micrographic stage. 

 It has a diameter of 100 mm (4 in.) and may be moved in two directions at 

 right angles to each other within a margin of 10 mm ( 3 / 8 in.) by means of two 

 co-axial inilled-heads. The amount of the movements is read by two separate 

 scales and verniers. Having no centring appliance, this stage is not interchangeable 

 with the large mechanical or the revolving vulcanite stage. 



t 



For this reason we supply the photo-mierographic stage only in con- 

 nection with Stands I C No. 5805 and 5810. 



i, Sena. 



