NEGRETTI AXD ZAMBRA, HOLBORN VIADUCT, E.G. 



FIG. 2247*. 



2246* 



2247* 



2248 



2249 



2250 

 2251 



2252 



2253 

 2254 



2255 

 2256 



2257 



2257* 

 2257f 



FIG. 2245*. 



Each. 

 s. d. 



Each. 



Forge, improved Portable Iron, adapted for soldering 



and brazing purposes, jewellers' uses, and suited for 



amateur mechanics Square 550 660 



Forge, portable Iron, improved with double bellows, 



the whole fitted together with nuts and screws for 



convenience of packing, arranged with connecting 



screw and pipe for blast furnaces (fig. 2247*) . 10 10 



A most useful article for persons residing in foreign parts, or Emigrants. 



Gas Apparatus, complete, for making oxygen and 

 hydrogen in quantities for the Oxy-Hydrogen Light 

 (see page 363) 330 



Gas Retort, Copper, with Conducting Tube, for the 

 preparation of Oxygen Gas, without Bag . . .110 1 10 



Ditto, Wrought Iron 110 



Ditto, Iron, small 12 6 



Gas Burners, or Furnace (Bunsen's), adapted for burn- 

 ing common gas, mixed with air, without smoke ; for 

 boiling, distiUing, &c. (figs. 2252, 2252*, 2252f) 



5s. 6d.; 8s. 6d. 12 6 16 



Gas Blowpipes, see ante, page 398. 



Gas Lamp, conveniently arranged on bronzed adjusting 

 table stand as a reading lamp, a microscopic illumi- 

 nating or preparing lamp, and also useful for chemical 

 operations, see page 271 (fig. 364*) Microscope 

 Section price 300 



Gauge Brass, for showing the expansion of metals' by 

 heat, see also Section Phenomena of Heat . 060 



Gutta Percha Basins, Funnels, Troughs, Trays, Tube, 

 &c., &c., . . various sizes and prices to order. 



Gutta Percha Bottles, round, for Acids, &c. . 



2-oz. 4-oz. 8-oz. 16-oz. 



Price . . Is. Is. 4d. Is. 6d. 2s. 6d. 



Hydrometers for testing Heavy and Light fluids of all kinds, see 

 pages 176 to 195. 

 Graduated Test or Mixing Jars for use with above, 3s. 6d. and 6s. 



