Why did Captain James Cook give the name "The Sandwich Islands" to the Hawaiian Islands on his discovery of them on 18 January 1778?
He named them for John Montagu John Montagu was the 4th Earl of Sandwich, then the First Lord of the Admiralty and Cook's superior officer.
What did Captain James Cook take on his sea voyages, as experience had taught him that it was an effective preventative of scurvy (containing vitamin C and lactobacilli)?