"Take any quantity of linseed oil; and put it into an earthen, or any other vessel of a broad form: so that the oil may lie in it with a very large surface; but the proportion should be so limited that the oil may be about an inch thick in the vessel. The earthen pans used for milk in the forming cream for butter are very well accommodated to this purpose. Along with the oil as much water should be also put into the vessel, as will rise six inches or more above the bottom. Place it then, with the oil swimming on the water, in any open place where the sun adn rain may have access to it; but where it may be as free from receiving dust and filth as possible. let it stand in this condition, stirring it on every opportunity, for five or six weeks, or till it appear of the consistence of treacle. Take it then from off the water, into a phial, or bottle of a long form, or what is better, into a separating funnel, such as is used by the chemists, and there draw off the remainder of the water. Place it afterwards, being in the long bottle or phial, in such heat as will render it perfectly fluid; and the foulnesses it may contain will soon subside to the bottom; when the clear part must be poured off; and the remainder strained through a flannel, while yet water, and will then be fit for use.",It is to be observed that this method is only practicable in summer: as the sun has not sufficient power in winter to produce a due change in the oil.,This method differs from that commonly praciced, in the addition of the water; which suffers the foulness to separate from the oil and sink to the bottom, where it remains without being again mixed with the oil every time it is stirred, as is unavoidable where no water is used: and likewise greatly contributes to bleach the oil, and improve it in other respects.