List of the Apochromatic Objectives. 



Beside the objectives enumerated in this list the following apochromatic 

 objectives are made to order and adjusted exclusively for the 10-inch tube: 



12 mm, 0.65 num. Ap Price: Mk. 140. . Code-word: Paflon. 



6 mm, 0.95 num. Ap 180. . Paganismo. 



The three, 6 mm, 4 mm, 3 mm, objectives of the dry series and the 2.5 mm 

 water immersion objective are supplied with correction-collars. 



As to the hind of immersion fluid to be used with homo- 

 f/eneous immersion objectives see pat/e J. 



