In mixing, place pieces of soap, and coloured powder, in layers in the box, making, in all, four alternate layers of each. When a layer of each has been placed in the box, sprinkle a pint of rose-water over the _cut soap_; for if it be much combined with the powder, it will become lumpy and hard, and consequently spoil the wash-balls. The same quantity of rose-water is to be used for moistening each of the other soap layers. Next mix a pint of thin starch, which has been well boiled in half a pint of rain water, with half a pint of rose-water, and distribute it equally well mixed among the mass, by turning it over repeatedly, and then press it down close with the hands. If a piece be now cut out from the mass, the operator will perceive whether the marbling is sufficiently good; and if so, he may proceed immediately to form his wash-balls. 339. TO IMITATE NAPLES SOAP. Take of fresh ley, strong enough to bear an egg, eight pounds, and put to it of deer’s, goat’s, or lamb’s suet, (which has previously been well cleansed from all skins, &c. by rose-water,) two pounds, and one pound of olive-oil, or rather behn-nut oil. Let all these simmer over the fire in a well-glazed pot, until it be pretty nearly of the consistence of crown or Naples soap; then turn it out into a large flat pan, which set on the leads or roof of the house, exposed to the heat of the sun for fifty days. The pan must be covered over with a bell glass, such as the gardeners use, and the mixture must be stirred once a day, during the whole of this time. In about six weeks or two months, the operator will have a most excellent ground-work for Naples soap, which only requires perfuming in the following manner, to render it even preferable to the foreign sorts. Take of oil of rhodium, one ounce, of spirit of ambergris, two ounces and a half, spirit of musk, half an ounce; mix these well together, and then put the compound into the pan of soap. Stir the whole well, and incorporate the perfumes with the soap, on a marble stone by means of a muller. Put up into small jars, or preserve in a mass in a large jar, according to sale or convenience. If kept for twelve months, this soap will be found, by comparison, to be far preferable to the best soap that ever came from Naples. SIMPLE DISTILLED WATERS. ———— 340. PRESERVATION OF FLOWERS FOR DISTILLATION. Rub three pounds of rose-leaves for three minutes with a pound of common salt. The flowers being bruised by the friction of the grains of salt, form a paste, which is to be put into an earthen jar, or into a water-tight barrel. The same process is to be repeated until the vessel is filled, so that all the roses may be equally salted. The vessel is then to be shut up and kept in a cool place until wanted.