Leitz Petrographical Microscopes 



NEW MODELS— WITH ENLARGED FIELD OF VIEW 



Microscope "S.M." with synchronic 

 rotation of the nicols 



These microscopes have been developed 

 on the basis of latest suggestions from 

 petrographists. Their novel and modern 

 design will prove a great aid in petro- 

 graphical studies. 



Every leading petrographist knows the 

 superior optical and mechanical qualities 

 of Leitz microscopes and we therefore 

 are fully safe if we refrain from enumer- 

 ating the many features. 



The variety of models we offer afford 

 a suitable equipment for every specific 

 requirement. 



The complete assortment of our petro- 

 graphical accessories will interest those 

 who desire to add to their present 

 equipment. 



Some of the prominent features of the new model 

 microscopes are: 



I. Improved Objective Clutch Changer which guarantees the objective to be 

 permanently centered. 



2 Anastigmatic Tube Analyzer which permits a most crisp definition. 



3. Special Illuminating Apparatus, whereby a wider range of application is 

 afforded. 



4. Enlarged Microscope Tube which accommodates eyepieces of wide diameter, 

 whereby the field of view is increased 50% over other types of instruments. 



Ask for Catalog II-B (F) 



60 East IQt^St. 



