45, COKNIIILL, E.C., AND 122, REGENT STREET, W., LONDON. 



231 



FIG. 780. 



Each. 

 s. d. 



775 Negretti and Zambra's Patent Magic Stereoscope, 

 in its most perfect form, with Extra Sized Lenses 

 throughout, the intermediate lenses, Patent Cylindrical, 

 for insuring a perfectly flat, colourless field and 

 freedom from distortion (as fig. 775) . . from 



Each. 

 s. d. 



18 18 



777 

 778 



779 



NEGRETTI AND ZAMBRA'S ACHROMATIC STEREOSCOPES. 



Achromatic Stereoscopes, with Opera Glass adjustment 



(fig. 776), in various plain mountings . . 25s. 1 15 2 



Ditto ditto ornamental mountings . . .220 3 



Achromatic Stereoscopes, with Rackwork Adjustment 

 and extra large Achromatic Lenses, high magnifying 

 power, suited for Glass Stereoscopic views . . 2 10 3 



Ditto ditto mounted on Adjusting Stand . . .440 5 



780 The Cabinet Form Stereoscope, in Walnut with 

 Rackwork adjustment, mounted on adjusting stand, 

 with Brass Slides and Clamps (fig. 780) ... 5 



50 660 



