22 



List of the Achromatic Objectives. 



For definition of the terms "Free working distance" and "Diameter of visible area of 

 object" see p. 16. 



All these objectives are also supplied adjusted for the English 

 10-inch body (tube-length 250 mm [about 10-in.]). 



With ref/ard to the kind of immersion fluid to be used with 

 homogeneous immersion objectives refer to pp. 10 and 11. 



The Systems DD, E, F contain Fluorite Lenses. 



