Abstract: A unilimb breathing circuit has a proximal end coupling member, a distal end coupling member, an expiratory tube extending between the proximal and distal end coupling members, and an inspiratory tube extending between the proximal and distal end coupling members. The expiratory tube is a corrugated expiratory tube that is expandable between a fully compressed rest position, and a fully expanded rest position, and has a plurality of intermediate rest positions. At the plurality of intermediate rest positions, the expiratory tube is capable of maintaining its rest length without the exertion of an external force. The inspiratory tube is a corrugated inspiratory tube having a length that is variable between a fully compressed rest position and a fully expanded rest position, and includes a plurality of intermediate rest positions between the fully expanded rest position and the fully compressed rest position.

Abstract: A method of decorating material for example paper consists of superimposing one marbled pattern on top of another marbled pattern. The marbled patterns are produced by floating and combining marbling ink on the surface of a bath of size solution. The upper marbled pattern consists of linear regions of ink formed by interspersing ink with transparent expanding agent on the surface of the size bath so that the ink is confined by the compressive effect of the expanding agent, thus the pattern is in outline only. The ink and expanding agent are applied to the surface of the size bath using a specially constructed frame comb.