24 



Modern Microscopy. 



A great convenience will be found in many instruments 

 of being able to lift the sub- stage aside out of the optical 

 axis of the instrument on a jointed fitting. It saves a deal 

 of time to students, especially where two or three powers 



F IG . 3._View of diagonal Kackwork attached to one of Watson and 

 Sons' Microscopes, showing Dovetailed Fittings to receive Fine 

 Adjustment Slide and Adjusting Screws (marked A). 



are constantly being changed, and the condenser may not 

 be required for all of them. Where this arrangement 



