the stitches that were knitted. In the end, one should obtain a "pocket" that can be opened (be sure to use wyif slip-stitches during binding off as well!) The wyif slip stitch prevents the yarn from crossing over to the back fabric, so that only the front fabric is knitted in any row. This is probably the secret technique of Anna Makarovna from Leo Tolstoy's War and Peace, who always knit two socks simultaneously When the pair was finished, she made a solemn ceremony of pulling one stocking out of the other in the presence of the children. Mosaic knitting Mosaic knitting uses two colors (usually both held at one side), but only one yarn is handled at one time. Let the first and second yarns be called "black" and "white" for specificity, although any two colors may be used. The knitter casts on an entirely white row. The knitter then introduces the black yarn and knits two rows, across and back. If a white stitch is desired at a given position, the stitch (from the white row below) is slipped wyib; by contrast, if a black stitch is desired, the stitch is knitted using the black yarn. The second (return) row repeats the slip/knit choices of the first row, effectively giving double height. (Note that, on the return row, the stitches are slipped wyif, since the fabric is being knitted from the wrong side.) The knitter then takes up the white yarn and knits two rows, across and back. Now if a white stitch is desired at a given position, the stitch is knitted with the white yarn; by contrast, if a black stitch is desired, the stitch is slipped from the row below (if it is black). If a black stitch is needed in a white-yarn row and the stitch of the previous row was white (i.e., slipped), the pattern is impossible for mosaic knitting. Therefore, any black or white vertical stripe must begin and end with the corresponding yarn, which implies that the number of knitted rows in any vertical stripe must be 2 times an odd number, i.e., 2x1=2, 2x3=6, 2x5=10, etc. However, this constraint on possible patterns can be well-hidden if the pattern is large enough. Mosaic knitting can produce many beautiful patterns, particularly geometrical or Grecian designs. Historically, mosaic patterns are rather rectilinear, being composed mainly of thin horizontal and vertical stripes that meet