47 



A curved cover, turned by special methods of our own, fits closely over the 

 openings into which the objectives are screwed and protects them against dust. 

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



When using a revolving nose-piece with Stand VII, a Clamping ring, No. 51 will 

 be found desirable (p. 66). 



Price : Code- words : 



Double Revolving Nose-nieces, No. 48 Marks 20. . Partial. 



'J'riple ,,49 27. . Pardina. 



Quadruple ,,50 32. . Pardogris. 



( 7tiin/>hi 



50 . 



{, No. 51, for Stand VII 



Pared. 



Fig. 20. 



Revolving Nose-piece, No. 48, 

 for 2 objectives. 



Revolving Nose-piece, No. 4J), 

 for 3 objectives. 



Revolving Nose-piece, No. 50, for 4 objectives. 



(Full Size.) 



2. * SI id ing Objective-Changers, Nos. 52 and 53, Fig. 21. 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. 21% 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. 



