Complex sentence: On 13 May 1779 Whitehurst was elected a fellow of the Royal Society, and in 1783 he was sent to examine the Giant's Causeway and the volcanic remains in the north of Ireland, embodying his observations in the second edition of his "Inquiry".
Split into simpler sentences: On 13 May 1779, Whitehurst was elected a fellow of the Royal Society. In 1783, he was sent to examine the Giant's Causeway and the volcanic remains in the north of Ireland, embodying his observations in the second edition of his "Inquiry".