Objective-changers 



Oculars : 



Analyser 



Axial-image 



Compensating 



Cross-line 



Goniometer 



HUYGENIAN 



Index 



Screw-micrometer .... 



Spectroscopic 



Stereoscopic 



with enlarged field of view 



for special purposes 

 Ocular cross-line micrometer . 



Ocular micrometer 



Orientation plate 



Paired Objectives for binocular 



Stands 



PFEIFFEK'S heating chambers . 



stage . . 



Photo-micrographic stage . . 



Plankton-searcher 



Polarisers 



Polarising apparatus 

 Preparations, microscopic . 

 Prism, erecting ........ 



Prisms, PORRO'S, in drum . . . 

 Prism Rotator 



Resolving power of objectives . 

 Revolving nose-pieces .... 

 Rules, measuring 



Selenite films 



Semi-apochromats 



Slides, Object 



