and materials required to dye the bottom. As to the
methods and materials required, they are just those usually employed
in indigo dyeing, and these have been described. The hydrosulphite
vat, or Messrs. Holliday's patent indigo, is, perhaps, the most
convenient method to adopt.

_Dark Slate_.--Give a medium indigo bottom, then mordant with 3 lb.
fluoride of chrome and 1 lb. oxalic acid, and dye with 1-1/2 lb.
Anthracene Brown W, 1/2 lb. Alizarine Bordeaux G, and 1 oz. Diamond
Flavine.

_Dark Navy_.--Give a medium indigo bottom in the vat, then mordant
with 3 lb. fluoride of chrome and 1-1/2 lb. tartar, finally dyeing
with 6-1/2 lb. Alizarine Cyanine G, and 1-1/2 lb. Alizarine
Bordeaux G.

_Dark Blue_.--Give a medium indigo bottom, then mordant with 6 lb.
fluoride of chrome and 2 lb. oxalic acid, finally dyeing with 14 lb.
Alizarine Cyanine Black.

_Blue Black_.--Give a deep indigo bottom in the vat, then mordant with
3 lb. bichromate of potash and 2 lb. tartar, finally dyeing with (p. 160)
6 lb. Alizarine Cyanine Black and 1-1/2 lb. Alizarine Cyanine 3 R double.

VIOLET SHADES ON WOOL.

Violet shades can only be obtained from the coal-tar colours, and of
these there are not many. The recipes which are given below will serve
to show what dye-stuffs are available, and will give some idea of the
tints they dye.

#With Direct Dyes.# _Pale Violet_.--Prepare the dye-bath with 1/2 lb.
Sulphon Cyanine, 1/4 lb. Geranine B, 5 lb. Glauber's salt, and 5 lb.
acetate of ammonia, working at the boil for one hour.

#With Basic Dyes.# _Violet_.--The dye-bath is made with 1 lb. Methyl
Violet 3 B, and 10 lb. Glauber's salt. A fine pure shade of violet is
obtained. Methyl Violet is made in many brands, distinguished as B,
B B, 2 B, 4 B, etc. By using either one or the other of these, a
variety of tints of violet, from a red shade with Methyl Violet R
through violet (B) to a violet blue with Methyl Violet 7 B, can be
dyed.

#Puce.#--A very bright shade of puce is dyed by using Methyl Violet R,
and 10 lb. Glauber's salt.

#With Acid Dyes.# _Violet_.--Make the dye-bath with 2 lb. Acid Violet
4 B S, 10 lb. Glauber's salt, and 2 lb. sulphuric acid. This gives a
pure violet shade. If Acid Violet 6 B S be used a bluer shade is
obtained.

_Reddish Puce_.--A very bright red tint of puce is obtained by using
2 lb. Acid Violet 4 R S, 10 lb. Glauber's salt, and 2 lb. sulphuric
acid.

_Bluish Violet_.--Make the dye-bath with 3 l