Describes several methods of aircraft propulsion from a 19th century inventor.
<bdi><a href="https://en.wikipedia.org/wiki/en:Matthew_Piers_Watt_Boulton" class="extiw" title="w:en:Matthew Piers Watt Boulton"><span title="British classicist (1820–1894)">Matthew Piers Watt Boulton</span></a>
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On Aërial Locomotion