“…There is ample evidence that a variety of anaesthetic agents and techniques have proved to be satisfactory (Gain, 1957;Matthews et al, 1957;Mendelsohn et al, 1957;Patrick et aL, 1957;Bourgeois-Gavardin et al, 1958;Keats et aL, 1958;Norlander et al, 1958;Musicant et aL, 1959). As a general principle, first choice must be the agent and technique with which the individual anaesthetist is most familiar.…”