This Machine uses a straight needle, and cotton, silk, or linen thread from the original reel; makes an elastic stitch; finishes the work by fastening it off at the end of the seam, making more perfect and secure sewing than hitherto accomplished, It woik.s with out noise, the beauty and accuracy of its movments attesting itssnperior work manship. A child of ten years can work it with ease. Machines having been sent out by other parties imitat ing the above, the 23ublic are cautioned thai none are genuine but those having " Judkins' Patent " upon them. The "Judkins" Lock-stitch Sewing Machine, £4:4:0. This admirable machine is the most per fect Hand-Shuttle Machine yet invented. It is so simple that the most inexperi enced can operate it without any pre vious instruction, while it is incapable of derangement by ordinary use. The range of application is unlimited ; any* thing that can be worn or require stitching in a house can be executed on this machine. The tension rarely re quires regulating. From muslin to dressed calico, woollen cloth, or even leather may be sewn without change of needle or cotton, or alteration ot tension. The work is easily guided by one hand, particularly with the aid ot the self-sewer, while the other is em ployed in turning it. When fixed on a stand it can be operated by hand or foot at pleasure, and it is then as effi cient as the most costly treadle machine. Besides all kinds of domestic use, it can be applied to many varieties of manu facturing use such as dress making, mantle-making, stay making, tailoring, or even boot-closing. The appplication of a hand machine to the stitching of leather opens a new field in the work of ladies. Special needles are provided, and with these work of the most elaborate and beauti ful description can readily be executed. The appearance of the machine is handsome and noble, and the finish to all the working parts cannot be excelled. Ample printed instructions accompany each machine. This machine obtained the Prize Medal at the Workmans' International Exhibition recenih held in London. The Princess of Wales Is a larger and stronger machine than the above, adapted for the heavier kinds of work. 