(another method of decreasing).... In knitting instructions p.s.s.o.
means to slip 1 st, K (or P) next st, then pass the slip st over the K
(or P) st by inserting left needle into slip st on right needle and
passing over the K st on right needle. Follow arrows in illustrations.
[Illustration: 18]
[Illustration: 19]
[Illustration: 20]
[Illustration: 21]