. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. r, and wrung; which will render it sufficiently whitefor most purposes. III. The Heckling.—We have already stated that, by the operation of heckling, athree-fold object is proposed: 1. the parting of the filaments into their finest fibrils;2. the separation of the short fibres which are unfit for spinning; 3. the equable andparallel arrangement of the long filaments. The instrument of accomplishing these ob-jects is a comb-fashioned tool, called the heckk or hackle ; a surface studd
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. r, and wrung; which will render it sufficiently whitefor most purposes. III. The Heckling.—We have already stated that, by the operation of heckling, athree-fold object is proposed: 1. the parting of the filaments into their finest fibrils;2. the separation of the short fibres which are unfit for spinning; 3. the equable andparallel arrangement of the long filaments. The instrument of accomplishing these ob-jects is a comb-fashioned tool, called the heckk or hackle ; a surface studded more or less 424 ^ thickly with metal points, called heckle teeth ; over which the flax isdrawn in such a way that the abovethree required operations may be pro-perly accomplished. The common construction of theheckle is the following: (see ) Fig. 424 is the ground plan,and Jig. 425 is the section. Uponan oblong plank a b, two circular orsquare blocks of wood c and d arefixed, in which the heckle teeth standupright. To give these a firmer hold they are stuck into holes in a brass or iron plate,. FLAX. 495 with which the upper surface of c and d is covered. Both heckles may be either associ-ated upon one board or separated; and of different finenesses ; that is, the teeth of the onemay be thinner, and stand closer together; because the complete preparation of theflax requires, for its proper treatment, a twofold heckling; one upon the coarse, andone upon the fine heckle; nay, sometimes 3 or 4 heckles are employed of progressivefineness. The heckle teeth are usually made of iron, occasionally of steel, and from1 to 2 inches long. Their points must be very sharp and smooth, all at an equal level,and must all graduate very evenly into a cylindrical stem, like that of a sewing needle,without any irregularity. The face of the heckle block must be uniformly beset withteeth, which is done by different arrangements, some persons setting them in acircle, and others in parall
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