acid which has remained in the goods,
or else the wool would be dyed too deep a shade. In some cases
hydrosulphite has proved a useful reducing agent; it can be easily
prepared from ordinary bisulphite of soda in the following manner. Add
10 oz. ammonia (0.9 specific gravity) to a gallon of bisulphite of
soda, 32 deg. Tw.; then add slowly under a brisk stirring 10 oz.
zinc-dust, and let the entire mixture settle well, using only the
clear solution. Treat the goods from fifteen to twenty minutes in a
bath of 140 deg. F., to which first add at the boil 3/4 oz. acetic acid,
10 deg. Tw., per gallon water, and then 4 to 6 gallons clear hydrosulphite
solution per 100 gallons liquor. Then rinse very well and dye in the
usual manner; avoiding, however, too high a temperature. As on this
class of goods dark shades are mostly dyed, the goods need only very
rarely be stripped.

_Bright Yellow_.--Use 2 lb. Thioflavine S in a bath which contains
4 lb. Glauber's salt per 10 gallons of dye-liquor.

_Good Yellow_.--A very fine deep shade is dyed with 2-1/2 lb. Diamine
Gold, and 24 lb. Diamine Fast Yellow A in the same way as the last.
Here advantage is taken of the fact that while the Diamine Gold dyes
the wool better than the cotton the Diamine Yellow dyes the cotton the
deepest shade, and between the two a uniform shade of yellow is got.

_Pale Gold Yellow_.--Use a dye-liquor containing 4 lb. Glauber's salt
in every 10 gallons, 2-1/2 lb. Diamine Fast Yellow A, 2 oz. Indian
Yellow G, and 3-1/2 oz. Indian Yellow R. In this recipe we use in the
two last dyes purely wool yellows, which dye the wool the same tint as
the Fast Yellow A dyes the cotton.

_Bright Yellow_.--Use in the same way as the last 2-1/2 lb Diamine (p. 176)
Fast Yellow B and 3 oz. Indian Yellow G.

_Gold Orange_.--Use as above 2 lb. Diamine orange G, 3-1/2 oz. Indian
Yellow R, and 1-1/2 oz. Orange E N Z.

_Deep Orange_.--Use 2-1/2 lb. Diamine Orange D C, 6-1/2 oz. Orange
E N Z, and 3-1/4 oz. Indian Yellow R.

_Black_.--Use 4-1/2 lb. Union Black S, 2 oz. Diamine Fast Yellow A,
5 oz. Naphthol Blue Black, 3-1/4 oz. Formyl Violet S 4 B, and 4 lb.
Glauber's salt in 10 gallons dye-liquor.

The goods are treated at the boil in this bath for one hour, Italian
cloths have frequently if not always to pass through a finishing
process to give them lustre. This treatment, especially with blues and
blacks, has a tendency to affect the shades, reddening them. With some
dye