BAIRD &TATLOCK (LONDON) LTD. 



1338 

 Revolving Nosepieces. 



1339 



1340 



1341 



Uuless otherwise ordered, we supply nosepieces of circular form, which are absolutely dust-proof in any position 

 of the objectives, revolve easily, register accurately, are of light weight, engraved with the equivalent focus of the 

 lives to be used and finished neatly in durable black lacquer-to prevent reflections. 



A great advantage is found in the fact that on these nosepieces we adjust our objectives so that they are 

 accurately centred and par-focal, enabling the user to change from one to the other with only a slight amount of 

 re(<i< ussing by means of the fine adjustment. To ensure this advantage it is highly important that the nosepiece 

 be ordered with the original outfit. 



If anyone should prefer the revolving nosepieces, as formerly made, we shall be pleased to supply them. 



1338 T (No. 1880.) Double 



1339 r (No. 1882.) Triple 



1340' (No. 1884.) Circular double 



1341 T (No. 1886.) Circular triple 



15 

 100 

 15 

 100 



1342 

 1342 T Mechanical Stage, Model B. (Bausch & Lomb's) No. 2114 A .. 



This model, attaching to the side of the microscope stage, can only be used on microscopes with square cornered 

 stages, and is adjustable to either the large or small pattern. 



2 16 3 



SPECIFICATIONS. 

 Clamp. Adjustable, with closed ends to fit corners of any square stage; attached by two set screws. 



Adjustments. By rack and pinion, giving equal speeds in both movements; right and left scale reads 80 mm., 

 backward and forward, 58 mm. ; range available dependent upon size of microscope stage, to which it is 

 attached; both scales graduated in single millimetres, with verniers reading to tenths; pinion milled heads close 

 together in fixed relative position, permitting of the use of both motions. 



Slide-holder. Provided with one adjustable stop and one fixed stop, which is actuated by a :-pnng 10 hold 

 slide rigidly in place ; will accommodate any sized slide up to 95 mm. in length ; slide rests on stage surface 

 and may be used in immersion contact with condenser, if desired. 



Finish. Main parts, except scales, neatly finished in black lacquer to prevent reflections. 



265 



