WATSON'S NEW STAND. 101 



The base of the stand is circular, with three project- 

 ing claws ; on this base a disc of metal, carrying the 

 pillar-support (of the limb, stage, etc.), is made to 



FIG. 56. Watson and Son's New Microscope Stand. 



rotate on the perpendicular optic axis ; a graduated 

 zone shows the angle of rotation. 



In the centre of the base a smaller disc (projecting 

 slightly above the general plane) is made to rotate ; 

 this disc has a groove into which the mirror-fitting 



