118 



Compensating Eye-pieces. <see pp. w-^. 



In addition we supply the following three Eye-pieces for the 10-inch tube: 



Projection Eye-pieces. 



(See new edition of our Catalogue of Photo-micro graphic 

 and Projection Apparatus.) 



Projection Eye-pieces 2 and 4 are also supplied for the lO-inch tube; their 

 descriptive numbers in this case will become 3 and 6 in accordance with their 

 increased eye-piece magnification when used with a tube-length of 250 mm. The 

 prices remain the same. 



When subsequently ordering compensating eye-piece 4* or projection eye- 

 piece 2*, the factory numbers of the stands with which they are to be used 

 should be given. 



When ordering eye -pieces for stands constructed by other 

 makers it is necessary to send us an exact impression in sealing- 

 wax of the tube edge, or, better still, to forward the actual tube 

 which the eye-pieces are to fit. 



