Complex sentence: After practicing this form of medicine for about ten years, Thomson wrote a book called "New Guide to Health; or Botanic Family Physician" in 1822, and sold "patents" to use his system of medicine to any family for $20.
Split into simpler sentences: After practicing this form of medicine for about ten years, Thomson wrote a book called "New Guide to Health; or Botanic Family Physician" in 1822. Thomson sold "patents" to use his system of medicine to any family for $20.