A dissertation on the true Cythisus of the ancients. Proving that the Medicago or Cythisus Maranth (not the bastard Sena, as asserted by a late author) is the plant that was held in so great esteem among the Romans. Also that it may be successfully made use of for the improvement of the most dry, barren, hilly land ... In a letter to a nobleman, who favour'd this enquiry. To which is added, an account of the great profits which arise ... from sowing the Lucerne and burning of clay, ... By Stephen Switzer