...In the top fin was an expandingdevice which could be filled with buoyant gas, produced by chemicals,when the craft neared the surface... 
Various 「Astounding Stories, August, 1931」
...The men especially pride themselves upon canoe-making; the favourite wood is the buoyant Okumeh or bombax, that monarch of the African forest...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 1」
...We were, at times, remarkably buoyant, singing hymns and making joyous exclamations, almost as triumphant in their tone as if we reached a land of freedom and safety...
Frederick Douglass 「My Bondage and My Freedom」
...Trevanion, following back into theraise, would have cut his heart out tosave that buoyant young life, but hisdevotion was the pure fealty of a serffor his sovereign...
Various 「Ainslee's magazine, Volume 16, No. 3, October, 1905」
...Each step I took rendered my spirits more buoyant and elastic,and each hill, the position of which I fixed, gave me, from itsappearance, renewed hopes...
George Grey 「Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2)」
...The double boat thus formed was suspended on belts of canvas which supported it buoyant and clear of the framework...
Thomas Mitchell 「Three Expeditions into the Interior of Eastern Australia, Vol 1 (of 2)」
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