This section is from "The Domestic Encyclopaedia Vol1", by A. F. M. Willich. Amazon: The Domestic Encyclopaedia.
Blue-Bottle (Corn), or the Centaureci (yearns, , L. is a plant common in corn-fields. See Withering-, 472; and Engl. Rot. 277. This vegetable is considered as a weed; but besides the property of affording a valuable paint, as mentioned in the preceding article, it is also much frequented by bees. A decoction of the flowers with galls and copperas, affords a good writing-ink; and it may also be employed with success in the dyeing of linen or cotton.
 
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