Morris had invented a sort of artificial synovial fluid. Made out by a mixture of boroglyceride, glycerine and normal saline solution, it resulted to be antiseptic and hygroscopic, so that it had a tendency to draw serous fluids towards itself. The consequences of all of its specific characteristics were that when injected into a joint, this fluid resisted absorption longer that an oil could. And these properties were particularly useful in cases of painful joints (especially those one of knee and shoulder).