103 



2. for Stand VI b . 



No. 173: Polarizer II and Analyzer II 



174: H I 



175: II ABBE Analyzer Eye-piece tt 



,, 176: II I 



Prices : 

 Marks 61.- 



44- 

 86.- 

 69.- 



Code-words: 

 Pencazo. 

 Pendado. 

 Pendencia. 

 Pendiente. 



Appliances for observing axial images, 



With the large Mineralogical Stand l b a BERTRAND lens, which is inserted 

 through an opening in the outer tube, forms the objective of an auxiliary micro- 

 scope for observing axial images. For the same purposes we provide a special 

 auxiliary - - the so-called Axial-image Eye-piece, No. 177 (see Fig. 58) - - to 

 be used in conjunction with our other stands. This auxiliary microscope consists 

 of a HUYGENIAN eye-piece 2 with sliding eye-lens combined with an objective 

 formed of two single lenses. The lower one of these lenses slides in a tube 

 and can thus be focused with respect to the upper focal plane of the objective. 



Code- word : 



No. 177: Axial-image Eye-piece Price: Marks 30.. Pendola. 



For examining and accurately identifying the axial images of small crystals 



we supply CZAPSKI'S *lris-diaphragm with Eye-piece, No. 178, Fig. 59, which 



fits into the tube. 



Fig. 58. 



Axial-image Eye-piece, 

 No. 177. 



(V, Full Size.) 



B. 



Fig. 59. 



Iris-diaphragm with 



Eye-piece, to fit into tube, 



No. 178. 



A. Longitudinal section and side 



elevation. 



B. Iris - diaphragm viewed from 



above. 

 (V, Full Size.) 



