Aëronautics: an abridgment of aëronautical specifications filed at the Patent Office from A. D. 1815 to A. D. 1891 (1893)
Brewer, Griffith, comp, Alexander, Patrick Y., joint comp, Great Britain. Patent Office · London, Taylor and Francis · leaf 53
42 A.D. 1867. No. 2115. BUTLER, James William, and EDWARDS, Edmund. " Flying Machine." An elongated triangulari aeroplane is employed, having a web down the centre of its underside, the aeroplane and web resembling in shape a paper dart. … Horizontal and vertical rudders guide the machine verti- cally and horizontally. Propellers or wings may be employed for imparting a forward movement to the apparatus, or a jet of steam or- other fluid may act by reaction on the air. When steam-power is employed, the aeroplane may be made hollow…
Aeronautics
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