Note 144 — Chapter II
Reading edition
Mr. Woodcroft patented, on the 18th of November, 1826, a mode “for propelling boats and vessels,” but no specification was enrolled; and on the 22nd of March, 1832, he “prolonged” his patent “increasing-pitch screw-propeller,” which he then fully described. (See “Specifications of Marine Propulsion,” Part XI. p. 112.)