Edam cheese is colored with what is called tournesol, which is extracted from a plant (_Croton tinctorium_). This is an annual, which grows wild in France, in great abundance, in the vicinity of Montpelier, in Languedoc; and around Aix, in Provence, large commons are sown with it. The seed is sown in March and April. From a white and straight tap root, it sends up a stalk something like six inches high, which divides into many branches. The leaves have very long stems, of a pale green color. The flower-stalks spring up from between the branches, and bear flowers in fan-shaped clusters. The vegetation of the plant continues four months. The preparation of the tournesol is as follows: The plants are collected late in summer, the roots thrown away, and the other parts taken to a mill, where they are ground, and the juice pressed out. Into this juice the rags of old hempen cloth are dipped till they are soaked full, when they are hung up to dry in the sun. When they are dry they are laid on a tray over a tub filled with urine, in which carbonate of lime has been dissolved, so that the edges hang over the rim of the tub on which they rest. The vapor from the solution of lime must penetrate the rags, and this gives them a violet color, when they are taken off and dried again, to be replaced till they are fully colored. The tournesol rags have become an article of commerce, for which France receives annually from Holland from 100,000 to 200,000 guilders (from $38,000 to $76,000). To give the Edam cheeses the red rind, they are rubbed with these tournesol rags, from which they got the dark violet color; and after they are dried they are again rubbed, which gives them a glowing red. It is an excellent peculiarity of the tournesol rags that they not only impart the color to Edam cheese, to which people abroad are so accustomed, but that they keep the insects from the cheese, whilst the coloring matter does not penetrate inside, but remains on the rind. Substitutes for it have been repeatedly sought, but not found; nor have the attempts made to grow the plant in Holland proved successful. USE OF THE WHEY OF THE NORTH DUTCH SWEET MILK CHEESE.--The whey obtained in making cheese in North Holland is collected in large tubs. The sweet, agreeable taste of the whey is soon lost when it is set to obtain the fatty particles still remaining in it. The cream which forms on it is daily taken off with a skimmer, put into a cream-pot, and when it is collected in sufficient quantity it is made into whey butter. CHAPTER XII. LETTER TO A DAIRY-WOMAN.