On sale in Portobello Road Market.During the 19c there were many people who used mild eletric shocks to "pep" themselves up Charles Wesley being one,and in more recent times Mrs Thatcher was reputed to do the same,it seemed to work for her! Who got the bigger shock her or the machine is not recorded http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/2188/20073/00928554.pdf?arnumber=928554