Abstract: A golfing aid for maintaining a true arc in a golf swing. Attached to the shaft of the club is a guide member which projects from the club and has on it a tip, which during the initial part of the downswing and the final part of the follow-through contacts the radial side of the leading forearm. The contact provides a positive tactile feedback to avert wrist cocking and encourages radial deviation of the wrist instead thereby encouraging the maintenance of a true arc in the downswing and follow through.

Abstract: A method of training golf swing including the steps of adjusting the position of a guide relative to a golf club so that the guide projects vertically when the club is held in an address position, a tip at a free end of the guide bears against the radius side of a leading forearm when the club is held in a back swing position, and the tip bears against the radius side of the leading forearm when the club is held in a follow through position. Repeatedly swinging the golf club between back swing and follow through positions. Correcting golf swing to ensure that at the back swing position the tip bears against the radius side of the leading forearm. Correcting golf swing to ensure that at the follow through position the tip bears against the radius side of the leading forearm. By use of the method the golf swing is trained to be within a plane and errors such as wrist cocking are detected and can be corrected.

Abstract: A pressure compensated emitter device for controlling rate of water discharge in a drip irrigation emitter tube, wherein the tube is of resilient material and is partly contained within a plenum, wherein an increase pressure results in a reduction of tube diameter. The tube may contain a core of copper or other metal which will inhibit root growth in the vicinity of the discharge orifice.