Complex sentence: He became a member of the Asiatic Society, to whose Transactions he contributed, from time to time, many valuable papers, and amongst these one of singular interest on the lacca insect, from which called lac was made.
Split into simpler sentences: He became a member of the Asiatic Society, to whose Transactions he contributed, from time to time, many valuable papers. Amongst these was one of singular interest on the lacca insect, from which called lac was made.