Lives of Boulton and Watt. Principally from the Original Soho MssNote 240 — Chapter XV · Watt again visits Cornwall—Invention of the Rotary Motion—The Patent Right again assailed.Reading editionWatt to Boulton, 16th March, 1782.◇Copy noteReturn to CHAPTER XV. Watt again visits Cornwall—Invention of the Rotary Motion—The Patent Right again assailed.