13 



List of Compensating Eye-pieces, 



In subsequent orders for eye-piece 4* the size number of the stand ivith 

 it is to be used should be stated. 

 Wlten ordering ei/e-pieces for stands of other makers it is necessari/ to send 

 us an exact impression in sealing wax of the tube edge or, better still, to send 

 the tube in question to our ivorks. 



Compensating eye-pieces for the English tube. Beside those enu- 

 merated above the following compensating eye-pieces are made to order for 

 the 10-inch tube. 



2: Equivalent focal length: 135 mm, Price: Mk. 25. . Code-word: Pajarete. 

 4: 67 25. . Pajarico. 



8 C : 34 35.. Pajarillo. 



The compensating eye-pieces for the continental tube may also be used on 

 the 10-inch tube, but in order to obtain correct eye-piece magnification for a 

 tube-length of 250 mm (about 10 in.) it is necessary to multiply the figures 

 engraved on the eye-pieces by 1.5. 



Table of Magnifications of the Apochromatic Objectives 

 with the Compensating Eye-pieces. 



Calculated for 16O mm (about 6 l / 2 in.) tube-length and an image distance 



of 250 mm (about 10 in.). 



With objectives adjusted for the 10-inch tube it is necessary to multiply 

 the magnifications given in the table by 1.5. 



