Working instructions are given, with diagrams, for simple methods of joining, bending, sealing, and reinforcing fine plastic tubing, chiefly of polyethylene; for making it larger or smaller, for fabricating cannulas, T pieces, and multiway junctions; and for connecting it to other pieces of apparatus. physiological techniques using polyethylene tubing; polyethylene tubing, physiological uses; tubing, polyethylene, fashioning techniques; methods, physiological, using polyethylene tubing; physiology, laboratory techniques for polyethylene tubing Submitted on November 8, 1963