44 



We supply revolving nose-pieces to receive 2, 3 and 4 objectives. 



Revolving Nose-piece, No. 48, 

 for 2 objectives. 



u. 



Fig. 18. 



Revolving Nose-piece, No. 49, 

 for 3 objectives. 



32. 



Revolving Nose-piece, No. 60, for 4 objectives. 



(Full Size.) 



Nos. 52 and 53. *Sliding Objective-changers, Fig. 19. This apparatus 

 is so arranged that the observer himself may centre each separate objective and 

 it admits of the use of an unlimited number of objectives. 



The tube-slide, No. 52, Fig. 19 a , is screwed on the end of the body like 

 an ordinary revolving nose-piece and may be secured with the slide action 

 either pointing to the front or turned sideways. 



The plane of the tube-slide is inclined to the axis of the tube at an angle 

 of about 84. The plane of the objective-slide, No. 53, is inclined at a cor- 

 responding angle so that, on being withdrawn, the objective moves slightly 

 away from the specimen. A screw - - turned by a watch key - - serves as a 



Revolving Nose-piece for two objectives 



three 



four ., 



Sliding Objective-changer 



Tube-slide 



Objective-slide, each 



Marks 

 15.- 



20.- 



25. 



&- 



8. 



Codeword 

 Pardal 

 Pardiiui 

 Pardogris 



Pareja 

 Parental 



