London. He supplied an azimuth compass designed by Gowin Knight to Joseph Banks for the voyage of commanded by Captain James Cook in 1772. The instrument cost £80.0.0. On 6 February 1808 the American sealer Topaz, commanded by Captain Mayhew Folger, arrived at Pitcairn Island to take on fresh water. There he found thirty-five survivors of the mutiny on HMS Bounty led by John Adams, who gave Folger 's azimuth compass and chronometer. References Notes Citations Sources Magnetic devices Navigational equipment