From over 300 arthritis sufferers, half of whom previously wore 'copper bracelets', three treatment-group-subjects were randomly allocated for a psychological study. This involved wearing 'copper bracelets' and placebo bracelets (amodised aluminum resembling copper) alternately. These groups, as also a control group, answered questionnaires. The copper bracelets were weighed before and after use. Preliminary results show that, to a significant number of subjects, the wearing of the 'copper bracelet' appeared to have some therapeutic value. A study of the components of sweat and the solubility of copper in sweat was carried out. In five sweat samples, the copper concentration was of the order 2 x 10(-5) M and after equilibrating with copper turnings at room temperature for 24 hours the samples turned blue in colour and contained approximately 2 x 10(-3) M copper. The permeability of skin to copper containing solutions has also been discussed. It has also been shown that the wearing of a 'copper bracelet' results in a weight loss in excess of the body's total burden of copper (100-150 mg). A pair of copper bracelets lost 80 mg in 50 days when worn around the ankles and a copper bracelet worn around the wrist also lost about 90 mg in that time.