The new art of flying,

Contains material which appeared in an article written by the author and published in "Harper's monthly magazine."Mode of access: Internet

Gas-engines and producer-gas plants; a practice treatise setting forth the principles of gas-engines and producer design, the selection and installation of an engine, conditions of perfect operation, producer-gas engines and their possibilities, the care of gas-engines and producer-gas plants, with a chapter on volatile hydrocarbon and oil engines,

Mode of access: Internet