The name "Le-Servomoteur" or slave motor was used by Farcot in 1868 to describe hydraulic and steam engines for use in ship steering. Actual origins of the term are lost in antiquity, but Otto Mayr cites a book published by the Farcot family that contains the first printed use of this term. In 1896, H Calendar in England developed the first electric servo-mechanism, which was a contactor-actuated "follow-up" device for use with strip chart recorders. In 1898, Nikola Tesla experimented with "wireless control" of model ships on the Potomac fiver basin He also used electric contactor "servo-motors" to steer model & ps remotely.