AMERICAK INSTITUTE. 115 



of A, which forms the needle-bar, and is indicated by F, into which the needle, h, 

 is fastened by a screw, t, and is easily removed at pleasure. The upper thread 

 passes from the spool over a spiral spring, j, and through a slot in the part holding 

 the spring, and between two small jaws affixed to the end of the needle-bar, which 

 grasp the thread so that it cannot be drawn up by the spiral spring, until the loop 

 has been formed and grasped by a circular needle G, on tip of a vertical shaft, H, 

 which passes through a slot at the end of F. H is a spiral post twisted in the 

 centre, like an auger, and as F moves up and down, it causes H to rotate in one 

 direction, passing G into the centre of the loop of the upper thread, and holding it 

 until the vertical needle, h, passes down again through a loop thrown out by the 

 under thread carried by G, when H retrogrades by the same means, to its former 

 position. The circular needle, G, is fed from a spool placed in a frame, L, sus- 

 pended from the bed-plate A, by a small dove-tail slot, /, so that it can be removed 

 at pleasure by simply drawing one of the sliding plates. The hemmer, for turning 

 down the raw edges of the fabric, is indicated by v, and is fastened to a bed-plate 

 A, by means of a thumb-screw. The tucking gauge is indicated by w, and is used 

 for measuring the width of the tuck, as the fabric passes under the needle. 



Fig. 3 shows the character of the stitch 

 when the threads are loose, by which it 

 will be seen that the under thread, fed 

 Figure 3. by the circular needle, G, is passed both 



through and around the loop of the upper thread, fed by A, in effect tying it twice. 



Fig. 4 shows the stitch after it is per- 



?^j^^,t^?^gg^at^^.^.;-.^d^s^5Mt::b^^:j^6^^^^>^T^ fected, which the proprietors claim to 



Figure 4. be as strong, elastic, and durable as the 



febric itself, and not liable to break in washing, wringing, or ironing. Even if the 

 thread should break at every inch, still the seam would be durable, for the strength 

 of seam is not dependent upon all the stitches remaining perfect, as each is sepa- 

 rately fastened and independent of the other. 



It is claimed that it will sew all kinds of fabrics, between and including gauze 

 or lace, and beaver cloth, without changing either needle, tension, or threads, and 

 that it will sew all equally well, without disarranging any of the machinery. 



[ji large silver medal awarded. 



