546 NEGRETTI AND ZAMBEA, HOLBORN VIADUCT, E.G., 



IMPROVED PRESSURE, REVERSING, OR PRINTING FRAMES. 



These frames are constructed that a uniform pressure may be obtained, thus 

 insuring perfect contact between the positive paper and negative plate. 



FIG. 3283. 



FIG. 3284. 



3283 



Mahogany 

 Each. 



3284 



Pressure Frames, with jointed backs for examination whilst Printing, in Oak 

 or French Polished Mahogany, of the best kind and make (fig. 3283) : 



Oak 

 Each 

 s. 



No 1 size of glass 9 by 7 in 12 



2 10 by 8 in 14 



3 11 by 9 in 15 



4 12 by 10 in ' 17 



6 15 by 12 in 12 



Pressure Frames, of Common kind and make, with screws or springs, and 

 hinged backboard and glass (fig. 3284) : 



Size for pictures, 7 by 6 in. 9 by 7 in. 10 by 8 in. 12 by 10 in. 14 by 12 in. 



Price . 7s. 6d. 9s. 6d. 13s. 6d. 16s. 6d. 21s. 



e. 



15 

 16 



18 



1 1 

 1 10 



3284* Instantaneous Photographic Shutters of different forms, Marshall's Patent 

 Pneumatic arrangement, the Economic Patent, the Phantom Pneumatic, 

 White's Shutter, &c., &c., supplied to order. Prices varying from 



21s., 26s., 30s. to 38s. each. 

 A cheap Drop Shutter can be supplied at 12s. 



3284f Enlarging Lanterns. Complete Enlarging Lantern, fitted with Paraffin 

 Lamp, 5 Inch Condenser and Achromatic front Lenses, best mounting 



and finish 10 10 



Ditto ditto 7 Inch Condenser 14 14 



FIG. 



3284J Improved Graphoscopes, for particulars and prices, see page 228. 



