270 



NEGRETTI AND ZAMBEA, HOLBOEN VIADUCT, E.G., 



FIG. 940. 



FIG. 961, 



FIG. 941. 



953 Stage Condenser or Side Illuminator, mounted on 



jointed arm 7s. 6d. 



953* Nachet's Prism, for Oblique Illumination 



954 Side Speculum Reflector, mounted as ditto (fig. 954) . 

 954* Dark Wells or Stops, three sizes on jointed holder 

 954f Micrometer for Stage, divided on glass, ^th and| TD ' 55 th 



of an inch 



955 Maltwood's Finder 



956 Polarising Apparatus fitted to Microscope . 



957 Tourmalines, mounted to fit eye-tube, price according 



to quality and size from 



958 Selenite, mounted for Stage . . . 



959 m Ditto ditto in Brass Mount .... 



960 Camera Lucida, Wollaston's, for drawing magnified 



image, mounted to fit microscope .... 



961 Ditto ditto with additional lenses and shades (fig. 961) . 



962 Beale's Neutral Tint Reflector (fig. 962) 



963 Improved Argand Oil Lamp, adapted for Microscopic 



purposes (fig. 963) 



964 Paraffin Microscopic or Reading Lamps, in various 



mountings (fig. 964) 



Each, 

 s. d. 



12 6 



110 



2 10 



020 



Each. 

 s. d. 



116 

 220 

 1 12 

 12 6 



10 6 

 086 

 3 15 



12 



2 

 7 



10 



1 10 



1 10 1 15 



