Abstract: A pack or set of four-sided, waterproof flashcards, which facilitates alternating between several subjects such as spelling, math and pattern recognition. One of the two faces of each flashcard is labelled with specific pairings of alpha-numeric characters or specific mathematical symbol pairings, or is substantially blank. Labelled in one of the four corners of the alternate faces of all of the flashcards in the set is a single small shape (for example, an oval shape). The colour of this shape varies, depending upon the information which is labelled on the aforementioned reverse faces of the flashcards. All of the flashcards may display non-permanent information, which can be printed, written or drawn by users onto both faces of the flashcards, with wet or dry erase markers, for many different interrelated learning purposes.

Abstract: A process is provided for batch treatment of textile material such as yarn packages, raw stock, knit goods, muffs or the like by placing the material in an enclosed zone, evacuating the enclosed zone to provide a vacuum therein, and then flooding the evacuated zone with a treating agent by placing the evacuated zone into communication with a second zone having the treating agent therein under a positive pressure. A substantial pressure differential exists between the two zones, and the treating agent flows extremely rapidly through the textile material whereby, at the very outset of the treating process, the treating agent is uniformly distributed over the surfaces of the textile material and substantially in its original concentration and condition. The treating agent includes a dyestuff and other agents, such as scouring agents, whereby several treating operations can be performed simultaneously.