382 



NEGRETTI AND ZAMBRA, HOLBORN VIADUCT, B.C., 



f 



PU 



FIG. 2017. FIG. 1979 



FIG. 1970. FIG. 1971. FIG. 1970*. FIG. 1998. 



1989 Gas B ottle, Clark's, for preparing Sulphuretted Hydrogen, 



1990 Gas Bottle, with bent glass tube, for generating 



Hydrogen, Sulphuretted Hydrogen, Carbonic Acid, 

 or Chlorine Gases (fig. 1990) . . . complete 



10 oz. 16 oz. 20 oz. 40 oz. 



Price . . Is. 6d. 2s. 2s. 6d. 3s. 



1991 Gas Flasks with Bent tubes as fig. 1763 



1992 Oxygen Gas Retort, of hard glass, with bent tube, for 



making pure Oxygen from Chlorate of Potash and 

 Oxide of Manganese ....... 



1993 Gas Receivers or Deflagrating Jars (figs. 1993 and 



1993*) for containing and preserving Gases for 

 experiment : 



Width. 



. 3 in. . 

 . 4 in. . 



s. a. 



2 6 



026 



016 



Price Plain. 



Is. 



Is. 9d. 



2s. 6d. 

 4s. 6d. 



Price Stoppered. 



Is. 6d. 



3s. 



5s. 



7s. 6d. 



Height. 



5 in. . 



7 in. . 



94 in. . . 5i in. 



Hi in. . 6i in. 



1994 Gas Receivers mounted with brass cap, stop-cock 



and bladder ferrule, (fig. 1994) 



about 7 in. high . . . 4 in, wide 

 9 in. ,, . . .5 in. 



1995 Gas Receiver (fig. 1995), mounted with Brass Cap and 



Stop-cock, and Graduated into Cubic Inches 



1996 Globular Receiver, with welted mouth, for showing the 



combustion of Phosphorous, &c., in Oxygen Gas 



1997 Gas Jars, Cylindrical, Stout Glass, for exhibiting the 



explosive nature of a mixture of Oxygen and Hydrogen 



6d. 



10 6 

 12 6 



16 6 



066 



009 010 



