An article in the April 2002 issue of World Mining Equipment entitled 'Newton's Law' discusses recent design development work in the field of gravity separation technology. This has focused primarily on enhancements of existing equipment types, notably in the enhanced gravity separator segment. In the applications sphere, however, progress is dynamic, for example in widening the technical and geographical application of jigs and improving the performance of spiral systems. In the marketing field both Falcon and Knelson have actively utilised the opportunity presented by Internet technology.