234 



NEGRETTI AND ZAMBRA, HOLBOKN VIADUCT, E.C., 



NEGRETTI & ZAMBRA'S 

 OPERA, RACE, FIELD, AND MARINE GLASSES, 



FIG. A. & 791. 



NOTICE. 



All Binocular Glasses named in the present List are comprised in Series and 

 Numbers, ranging from 1 to 7 ; but as some of the numbers are omitted in certain 

 Series, it will assist in the selection of any particular Glass if reference is made to 

 the following Table, where the approximate size of the Object Lenses is marked 

 opposite each Number. These Numbers apply to any one of the Fourteen Series. 



Glass No. 1 

 2 

 3 

 4 

 5 

 6 

 7 



Size of Object Lenses, 1 inch. 

 If 



IS 

 4 



If 



791 Twelve-lens Achromatic Binocular Race Glass (fig. A), (having Triple 

 Combination Eye and Object Lenses) very powerful, great field of view. 



with Solid Leather Case and Strap 660 



Aluminium ditto ditto 12 12 



See also No. 6, Series I. 



