and for staining and gilding Glass^ 



267 



Flux, No. 5. Flint glass 

 Flux, No. 2, 

 Red lead 

 No. 6. Flux, No. 2, 

 Red lead 

 Flint powder 

 Flux, No. 4 

 Colcothar 

 Red lead 

 Borax not "1 

 calcined J 

 Flint powder 



No. 7. 

 No. 8. 



6 

 4 

 8 

 10 

 4 



H 



6 

 I 



6 



4 

 2 



FluXjNo.l. Red lead 8 parts 

 by weight 

 *Calcined borax H 

 Flint powder 2 

 Flint glass 6 



No. 2. Flint glass 10 

 White arsenic 1 

 Nitre 1 



No. 3. Red lead I 



Flint glass 3 



No. 4. Red lead 9{ 



Borax not calc.5| 

 Flint glass 8 



After the fluxes liave been melted, they should be poured on a 

 flag-stone wet with a sponge; or into a large pan of clean water, 

 then dried, and finely pounded in a biscuit-ware mortar for use. 

 Yellow Enamels. 



V Red lead .8 



Oxide of antimony . . . . 1 



White oxide of tin . . . . 1 



Mix the ingredients well in a biscuit-ware mortar, and having 

 put them on a piece of Dutch tile in the muffle, make it gra- 

 dually red hot, and suffer it to cool. 



Take of this mixture . . 1 



Offlux, No. 4 .. ..If 



Grind them in water for use. 



By varying the proportions of red lead and of antimony, dif- 

 ferent shades of colour may be obtained. 



Another Yellow. 

 Take three parts by weight of sheet lead and one part of block- 

 tin, melt them together in a ladle or a flat shovel, and skim off 

 the top in proportion as it oxidates ; when a sufficient quantity 

 is obtained, place it in the muffle in a gentle heat, to reverberate 

 and entirely calcine any remaining particles : 



Of which take .. ..71 



Oxide of antimony . . . . 1 



Litharge . . . . . . 1 



Mix these well together, and give them a red heat in a muffle 

 to bind them together, but not to melt. Use the same fiiix as 

 for the other yellow. 



Orange. 

 Take red lead .. 12 I Oxide of antimony .. 4 

 Red sulphate of iron 1 | Flint powder . . 3 



* Borux ciilcined to a. dry white calx in a crucible, only a third pSrt of 

 which should l)c filied ot oiice, ou account of the borax swelling so much as 

 it gets tiot. 



well 



