The alum solution, and the sulphate of copper, and the verdigris, or acetate of copper should be always ready. It is necessary to have a tub for each, in size proportioned to the work to be done; but larger for the alum than for the other two. Sulphate of iron is also used in some dark greys, browns, slates, and in all blacks; this will require a tub as large or larger than that for alum. When the yellows are dyed and wrung as dry as possible, they should be taken into a close room or stove to dry, particularly in _London_, because of the smoke, especially in winter. A German, or other stove, should be placed in the room, the size of which, as well as the number of the stoves, must be regulated by the quantity of the work. When the goods are dry they must be sent to the callenderers, if directed to be callendered; but the general and better way is to stiffen them with starch after they are dyed, and before they are dry; and when dry they should be sent to the glazers, instead of the callenderers, except when both branches are carried on by the same person. When furniture, originally yellow, has become faded, it may be re-dyed thus: In this case it should be dyed rather of a fuller shade than the original. A large flat tub, such as described above, is to be filled three parts full of water, to which sufficient sulphuric acid must be added to make it taste strongly sour. After being well stirred, the pieces are to be put in, and worked in this sour liquor; and the yellow dye in consequence is stripped off. If the acid liquor be not strong enough more acid must be added, with the precaution of well mixing it with the water, and the goods must be passed through the liquor again: by these means the yellow is discharged. They are then to be taken out on a board upon the tub and wrung by two persons; then to be washed off and wrung, washed and wrung again, when they are fit to be dyed. It is still to be remembered that any faded or worn out colour, or that goods more or less decayed, seldom become so bright as the colour which a new piece of goods receives from the same dye. Some cloths for re-dyeing require the application of oxymuriate or chloride of lime to discharge their colours, particularly when madder or galls, &c. form the constituent parts of the dye. In this case if a _bleacher_ be near it might be best to let him perform the process with the oxymuriate of lime; not only from the pernicious nature, but also from the expense of it, which, unless the business be upon a large scale, will not pay the dyer for his trouble. However, if the dyer thinks proper to perform this operation, then the oxymuriate of lime or bleacher's ashes, &c. may be obtained at the dry salters and dissolved in a cask, and the clear liquor used in proportion to the quantity of goods, the colour of which is intended to be discharged, which, when done, should be washed off in two waters at least before they are dyed.