[ 175 'j 164 



over a glass rod i, and through the eyes of the drop-wires, and then 

 gather together in passing through the eye of the guide-wire /. In 

 order to distribute equally over the bobbins the silk threads thus ga- 

 thered together, an alternating motion is given to the sliding bar cc, 

 which carries the guide-wii'cs /, by means of a pin r, working in an 

 oblique or spiral groove in the block 6, fixed on the end of the axis «; 

 and the obliquity of this groove corresponds with the length the silk 

 is to be distributed on the bobbin, and therefore causes the sliding 

 bar to move to and fro that length ever)- turn of the wooden roller, or 

 every four turns of the bobbin — the bobbin rollers being one quarter 

 the size of the wooden rollers d d. 



The bars fihhh. v/hich support the supplying bobbins, are so placed 

 as to make the bobbins stand at right angles v/ith the thread when it 

 passes from their middle to the glass rod. It is best to make the four 

 eyes of the drop- wires lie parallel to the glass rod, as their vibrations 

 on ihe threads will be more equal. 



Figs. 8 and 9 show the tinned iron facings which are coiled round 

 under the bars at y, to support the crank-wire. 



Fig, 10 shows how the guide-wires are bent and fixed in the sliding 

 bar. 



q q, Fig. 2, are two sliding wires: it will be seen that v/here four 

 threads are tramming, it is drawn back; but v/here two threads are 

 tramming, it is pushed in to support the two drop-wires that are out of 

 use, and prevent their acting on the crank-wire. 



Fig. 11 shows the manner of riveting the wooden rollers on the 

 axis, by cutting up a burr with a chisel on the angles 2 z. 



Fig. 1 and 2 are a guard-rail. 



Fig. 1 and 2 are one-sixth, the others are one-fourth the real size. 



Jmprovement in ihe Silk JFecver's Draw Boy. — By Mr. E. Rich- 

 ards, of Beihnal Green. 



Trans. Soc. Arts, London, vol. 49, p. 185. 



In weaving plain goods, of every description, composed of silk, 

 wool, hemp, cotton, or flax, the threads composing the warp are form- 

 ed into two sets: the 1st, 3d, 5th, &.c. forming one division, and the 

 alternate ones, the 2d, 4th, 6th, &c. forming the other: each set is 

 alternately raised and depressed, and at every crossing of the sets, the 

 shuttle, containing a spindle full of thread, is shot, or thrown from 

 one hand to the other, distributing the thread in its passage, in front 

 of every intersection of the threads that compose the warp; but in 

 figured silks, the tl)reads of the warp are formed into more divisions 

 than two — the number varying according to the pattern; and in order 

 that each division may be raised or depressed with the necessary accu- 

 racy, each thread of the warp is passed through a loop in a vertical 

 cord, furnished with a weight at bottom, to keep it properly stretched, 

 and passing over a support at top. These vertical cords are called the 

 monture, and are collected into as many sets or lashes as the pattern 

 requires; it being understood that the cprds of those threads which 



