552 NEGRETTI AND ZAMBBA, HOLBORN VIADUCT, E.G., 



s. d. 

 Per oz. 



3387 Potash, Bichromate 006 



3388 Chlorate per Ib. 026 



3389 Nitrate Is. 001 



3390 Potassium, Bromide, pure 010 



3391 Cyanide . . . in 1 Ib. bottles, 4s. 004 



3393 Fluoride 008 



3394 Iodide, pure 016 



3395 Plate Cleaning Solution .... per bottle 010 020 



3396 Silver, Nitrate, see page 



3397 Oxide, pure 090 



3399 Soda, Acetate per Ib., Is. 6d. 002 



4000 Hyposulphite ... 28 Ibs., 6s. 6d., per Ib. 004 



4001 Phosphate ........ 002 



4002 Sodium, Chloride, pure , 002 



4003 Fluoride 0' 1 6 



4004 Sugar of Milk 008 



4005 Grape 006 



4006 Tannin 010 



4007 Test Paper, Blue Litmus, or Red . . . per book 002 



4009 Tripoli 004 



4010 Rouge, fine . . 006 



4011 Rottenstone, prepared ....... 006 



4012 Uranium, Nitrate per tube 030 



4013 Varnish, Amber, in Chloroform 016 



4014 Crystal Varnish . . . per bottle, 4s. 004 



4015 Black Jet per bottle 006 010 



4016 Sohnee Freres .... 019 



4017 Spirit Varnish ...... per pint, 7s. 006 



4018 Water, distilled, Chemically pure . . per gallon 008 



4019 White Wax, free from Stearine ... per Ib. 040 



These prices are subject to frequent variation. 

 All other Chemical Tests and Re- Agents supplied to Special Order. 



Messrs. Negretti and Zambra in republishing their Catalogue of Cameras, Lenses, and Apparatus 

 med in the Photographic Art, wish to state, that being exclusively Photographers at the Crystal Palace, 

 Sydenham,for over thirty years, they are enabled from their lengthened practical experience to supply 

 such Instruments as will really be found of service to purchasers. The larger portion of the items in 

 the List are made under N. $ Z's. personal superintendence ; and being finished with all the most 

 recent and useful improvements they will be found to work with the least possibility of failure. 

 Photographic Lenses or Apparatus supplied by Negretti and Zambra to customers can be if desired 

 tested by their Operators at the Crystal Palace, and every explanation given as to Photographic 

 Processes and Improvements that may be from time to time introduced. 



INSTRUCTION IN PHOTOGRAPHY, by CAPTAIN ABNEY, Price 3s. 6d. 



NEGRETTI & ZAMBRA'S ILLUSTRATED GUIDE TO PHOTOGRAPHY. 



Austrian Gold Medal, for Photographic Stereoscopic Views on Glass. 



