Lee’s machine produced a straight web which required to be cut and sewn to shape; then to it was added the ribbing device and the narrowing and widening attachment, to shape the web to fit the body without cutting; but still a seam existed in the stocking where the edges united. In 1816, however, M. I. Brunel built a circular machine having an endless row of needles, and in 1831, Timothy Bailey, of New York, applied power to the knitting frame; the result being that at this time a tubular seamless fabric could be produced on a power machine. The latch-needle, which has given to the knitting machine great capacity and diversity of product, was not invented until about 1847, by Mr. Aiken, of New Hampshire. A period of development then set in that continues to the present time. The needles by cam mechanism were made independently operative in a circular carrier; narrowing and widening devices to produce pouches, such as the heels and toes of stockings, were added, as was also feeding mechanism for the introduction of different colored yarn, or a reinforcing thread. Such machines, of 1868 and 1870, would form a stocking or undergarment well fitted to the form; but they required the constant attention of a skilled knitter, until pattern mechanism was introduced to control the time of introduction of the colored or additional thread, and the place for formation of the narrowed or widened web. In forming the heel and toe pockets, a part of the needles are thrown out of action, and the movements to operate the active needles are changed from round and round, or circular work, to reciprocating. At each reciprocation one or more needles, at the end of the series, are rendered inactive, until one half the required pocket is formed; then they are successively returned to action, and circular knitting resumed. It may be also an additional thread is introduced to reinforce the wearing qualities of the heel and toe, or a differently colored yarn may be thrown in to give figure, but all such movements are now automatically controlled by a pattern mechanism. The ribbed leg portion of a stocking is formed either in the same machine that fashions the foot or in a separate machine to which the foot is transferred, but in either case the pattern mechanism again controls. [Illustration: KNITTING IN THE OLD WAY.]