X-ray installation, by Russell John Reynolds, London, England, 1896-97. Consists of:- 13-inch spark coil mounted on glass pillars, with mercury dipper break (motor control) and commutator, all mounted on wooden stand; condenser mounted in mahogany case; three-legged wooden tube stand; chromic acid battery; two x-ray tubes and three fluorescent screens. Known as the Russell-Reynolds x-ray machine.