252 



NEGEETTI AND ZAMBEA, HOLBORN VIADUCT, E.G., 



FIG. 862. 



Each. 



s. 



150 



NEGRETTI & ZAMBRA'S EQUATORIAL TELESCOPES. 



862 Negretti & Zambia's Universal Equatorial Telescope (fig. 862), 



with Object Glass 4-in. diameter, 4-f t. 9in. focal length, and four 

 eye-pieces, magnifying 80, 155, 230, and 310 diameters 



863 Ditto, ditto, but with Object Glass 4| in. diameter. 5 ft. 3 in. 



focal length, and four eye-pieces, magnifying 8*5, 170, 255, and 

 350 diameters, mounted on bronzed iron pillar 5 ft. 6 in. high . 200 



864 Ditto, ditto, with Object Glass 5 in. diameter, 6 ft. focal length, 



and five eye-pieces, magnifying 65, 190, 195, 240, and 390 

 diameters ........... 275 



865 Ditto, ditto, with Object Glass 6 in. diameter, 8 ft. 6 in. focal 



length, with five eye-pieces, magnifying 90, 140, 275, 410, and 

 550 diameters ; also an improved Diagonal Eye-Piece for Solar 

 Observation and for viewing objects near the Zenith . . 420 



Estimates given for Larger Instruments on application. 

 Equatorial Telescope Stands From 42 



















