( 10 ) 



GKEATLY REDUCED PRICES 



OF 



OBJECT-GLASSES MANUFACTURED BY 



R, & J. BECK, 



68, CORNHILL, LONDON, E.G. 



ECONOMIC ACHROMATIC OBJECT-GLASSES, 



Applicable to all Instrdmen'ts made with the Universal Screw. 



No. 



I 150 

 ! 151 

 152 

 163 

 154 

 155 

 156 

 157 



Focal length. 



Angle, 

 of i 

 aper- i 

 tare, \ 

 about : 



Price. 



' Magnifyikg-power, ; 

 , with 6-inch body and | 

 ! eye-pieces. 



s. d. 

 



3 10 

 6 



No. 1. No. 2. No. 3. 



12 

 18 

 46 

 90 

 170 

 250 



350 

 654 



15 



23 



61 



116 



220 



330 



450 



844 



27 



41 



106 



205 



415 



630 



800 



1500 



Bevleed Catalogue sent on application to 

 «. &: ,T. ISECK, C5^, Coriiliill, 



