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Rugs: the dyes

when doing their best work, Oriental weavers use the softest of permanent dyes. The result obtained is in every case a thing of beauty and utility. The aniline dyes are, of course, not to be compared to the vegetable, although the best of them are not to be utterly con­demned. The poorest aniline dye eats into the rug, and the color fades.

Madder ranks high among those plants which yield a permanent dye. It belongs to the genus Rubia; the root employed is that of the Rubia finctorum. This is largely cultivated in certain districts of India, but the best comes from near Smyrna, and from other parts of Asiatic Turkey. The plant grows wild throughout a large section of Central Asia and Russia. With both the European and the Indian madders the roots of the plants are the only parts that yield the dye. In the roots three coloring matters are obtained: alizarin and pur-purin, which are both red, and xanthin, which is yellow. Cochineal was introduced for dyeing purposes in 1856. It is the product of an insect called Coccus cacti, which lives on a species of cactus. Yellow is often produced from Persian berries, turmeric, saffron, and sumac.