Langley Memoir on Mechanical Flight, Parts I and II, Volume 27 Number 3, Publication 1948, 1911Note 31 — Chapter IX · HISTORY OF LAUNCHING APPARATUS AND FIELD-TRIALS OF AERODROMES 4, 5 AND 6Reading edition“Experiments in Aerodynamics.”◇Copy noteReturn to CHAPTER IX HISTORY OF LAUNCHING APPARATUS AND FIELD-TRIALS OF AERODROMES 4, 5 AND 6