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 87
76 This invention is very similar to one previously described, by the same inventor. … A.D. 1878. No. 2421. SAMPLE, James. (Provisional only.) " Propeller." A propeller for aerial machines is constructed with blades shaped like the wings of a bird, which reduces the slip of the propeller in the air. A.D. 1878. No. 3228. BREWER, Edward Griffith. (Provisional only. Communicated by…
Aeronautics
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