Hydraulic action operating table at nursing exhibition . The latest type of operating table , which is raised and lowered by hydraulic action , is among the exhibits at the annual nursing exhibition which has opened at the University of London , South Kensington , London . thousands of nurses from every part of the country have assembled in london for the conference with which the exhibition is linked . Photo shows , demonstrating the latest type of hydralic action operating table at the Nursing Exhibition . 21 April 1936