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To dye silks yellow

Silk may be dyed of different shades of yellow, either by weld or quercitron bark, but the last is the cheapest of the two. The proportion should be from one to two parts of bark, to 12 parts of silk, according to the shade. The bark, tied up in a bag, should be put into the dyeing vessel, whilst the water which it contains is cold; and when it has acquired the heat of about 100 degrees, the silk, having been previously alumed, should be dipped in, and continued, till it assumes the wished-for colour. When the shade is required to be deep, a little chalk, or pearl-ash should be added towards the end of the operation.