For 100 kil.--The scoured and washed wool is mordanted by boiling for 1½ hours in a bath containing 3 kil. chromate of potash and 2½ kil. tartar, and lightly rinsed; when it can immediately be dyed. For 1,000 lit. water, 1 lit. acetic acid of about 7° Be. is added to the bath. If the water is very hard, double the quantity of acetic acid, which is indispensable, is added. Then the required quantity of dyestuff is added, well stirred, the wool entered, and the temperature raised to boiling, which is continued for 2½ to 3 hours, that is, until a sample taken does no longer surrender any color to a hot solution of soap. Loose wool and worsted slubbing can be entered at 60° C. (140° F.). In dyeing yarn and piece-goods, however, it is advisable to enter the bath cold, work for about 1/4 hour in the cold, and then slowly to raise the temperature in about one hour to the boiling point. With this precaution, level and thoroughly dyed goods are always obtained. If the wool is entered in a hot bath, or if it is rapidly brought to a boil, the dyestuff is too rapidly fixed by the mordant and is liable to run up unevenly, and, with piece-goods, more superficially. For the same reason the goods must always be well wetted out before entering the bath. We add some special recipes for the various colors, the mordant for all of them being of 3 per cent. chromate of potash and 2½ per cent. tartar for 100 by weight of dry wool. 1. _Orange, Brown Touch_. 20 kil. wool, mordant with 600 grm. chromate of potash and 500 grm. tartar, dye with 3 kil. alizarine orange W. 2. _Ponceau, Yellow Touch_. 20 kil. wool, mordant as for No. 1, dye with 2 kil. alizarine red WR 20 per cent. 3. _Ponceau, Blue Touch_. 20 kil. wool, mordant like No. 1, dye with 2 kil. alizarine red WB 20 per cent. 4. _Dahlia_. 20 kil. wool, mordant like No. 1, dye with 5 kil. galleine W. 5. _Green_. 20 kil. wool, mordant like No. 1, dye with 6 kil. coeruleine W. _For Piece-goods._ 20 kil cloth, mordant the same, dye with 1 kil. 200 grm. coeruleine SW. 6. _Blue, Bright_. 20 kil. wool, mordant the same, dye with 6 kil. alizarine blue WX. _For Piece-goods._ 20 kil. cloth, mordant the same, dye with 1 kil. 200 grm. alizarine blue SW. 7. _Blue, Dark and Red Touch_. 20 kil. wool, mordant like No. 1, dye with 6 kil. alizarine blue WR. _For Piece-goods._ 20 kil. cloth, mordant the same, dye with 1 kil. 200 grm. alizarine blue SRW. Particular stress is to be laid upon the great fastness of the alizarine dyes against light and fulling. Besides, these dyestuffs contain nothing whatever injurious to the wool fiber. Sanders, which very much tenders the wool, as every dyer knows, can in all cases be replaced by alizarine red and alizarine orange, making an end to the spinners' frequent complaints about too much waste.