_Emerald Tint._--Mordant the cotton in the usual way with 1 lb. tannic acid and 1 lb. tartar emetic; dye to shade at 180 deg. F. in a bath containing 14 oz. Auramine G, 2 oz. Brilliant green, then lift, wash and dry. _Orange._--Mordant with 3 lb. tannic acid and 2 lb. tartar emetic, then dye with 4 lb. Tannin orange R. _Scarlet._--Mordant with 3 lb. tannic acid and 2 lb. tartar emetic, and dye with 2 lb. Tannin orange R and 1 lb. Safranine S. _Dark Scarlet._--Mordant with 3 lb. tannic acid and 2 lb. tartar emetic, and dye with 1/2 lb. Tannin orange R and 2 lb. Safranine S. The Janus colours are a series of dyes of a basic nature which can be applied somewhat differently to the ordinary basic dyes, although the ordinary method can be followed. With these Janus dyes a two-bath process is followed. A dye-bath is prepared containing the dye-stuff, sulphuric acid and common salt, and this is used at the boil from half to three-quarters of an hour, and the goods are allowed to remain in another three-quarters of an hour while the bath cools down. Next the dyed goods are run in a fixing bath of sulphuric acid, tannic acid and tartar emetic, this is used at the boil from half to one hour, after which the dyed goods are taken out and washed. If necessary the goods may be now topped with basic colours in order to produce any desired shade. The following recipes will show how the Janus dyes may be used:-- _Blue._--Dye with 9 oz. sulphuric acid, 8 oz. Janus blue G, and 5 lb. common salt; fix with 3/4 lb. sulphuric acid, 8 oz. tannic acid and 4 oz. tartar emetic. _Turquoise Blue._--Dye with 9 oz. sulphuric acid, 1 lb. Janus green B and 10 lb. salt, fixing with 3/4 lb. sulphuric acid, 1 lb. tannin and 1/2 lb. tartar emetic. _Dark Blue._--Dye with 9 oz. sulphuric acid, 2-1/2 lb. Janus blue R and 15 lb. common salt; fix with 3/4 lb. sulphuric acid, 2-1/2 lb. tannic acid and 1-1/4 lb. tartar emetic. _Buff._--Dye with 9 oz. sulphuric acid, 2 oz. Janus yellow R and 3 lb. salt; fix with 3/4 lb. sulphuric acid, 3 oz. tannic acid and 3 lb. tartar emetic. _Crimson._--Dye with 9 oz. sulphuric acid, 2-1/2 lb. Janus red B and 15 lb. salt, fixing with 3/4 lb. sulphuric acid, 2-1/2 lb. tannic acid and 1-1/4 lb. tartar emetic. _Red Violet._--Dye with 9 oz. sulphuric acid, 1 lb. Janus claret red B and 10 lb. salt; fix with 12 oz. sulphuric acid, 1 lb. tannic acid and 1/2 lb. tartar emetic. _Orange._--Dye with 9 oz. sulphuric acid, 1 lb. Janus yellow R and 10 lb. salt; fix with 12 oz. sulphuric acid, 1 lb. tannic acid and 1/2 lb. tartar emetic. _Dark Violet._--Dye with 9 oz. sulphuric acid, 2 lb. Janus grey B and 15 lb. salt; fix with 12 oz. sulphuric acid, 2-1/2 lb. tannic acid and 1-1/4 lb. tartar emetic. _Chocolate Brown._--Dye with 9 oz. sulphuric acid, 3-1/2 lb. Janus brown B and 15 lb. salt, fixing with 2 oz. sulphuric acid, 2-1/2 lb. tannic acid and 1 lb. tartar emetic. (6) DYEING ON METALLIC MORDANTS.