( 10 ) 



GREATLY REDUCED PRICES 



OF 



OBJECT-GLASSES MANUFACTURED BY 



U. 8c J. BECK, 



68, CORNHILL, LONDON, E.G. 



PRICES OF BEST ACHROMATIC OBJECT-GLASSES. 



ECONOMIC ACHROMATIC OBJECT-GLASSES, 



Applicable to all Instruments made -with the Universal Screw. 



No. 



Focal length. 



150 

 151 

 152 

 153 

 154 

 155 

 156 

 157 



3 inches 

 2 inches 

 1 inch . 

 ^ inch . 

 I inch . 

 A inch . 

 ^ inch . 

 ^Limm. 



Angle 



of 

 aper- 

 ture, 

 about 



Price. 



MAGN^FTING-PO^VEB, 



with 6-inch body and 

 eye-pieces. 



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



18 



38 



80 



no 



no 



180 



s. d. 

 



3 10 

 6 



12 

 18 

 46 

 90 

 170 

 250 



350 

 654 



15 



23 



61 



116 



220 



330 



450 



844 



27 



41 



106 



205 



415 



630 



800 



1500 



Eevised Catalogue sent on application to 

 R,. Jte J. BECIi, OS, Coi-nliill. 



