...The steam feels acrid in the throat, but is not inflammable, as it did not burn when I held a bunch of lighted grass over the bubbles... 
David Livingstone 「Missionary Travels and Researches in South Africa」
...Bladder-like bubbles sputter in ebb andflow, from the red holes over his lungs...
W. E. Webb 「Buffalo Land」
...His little fountain of melody bubbles forth irrepressiblyto cheer his mate or challenge a rival...
Frank M. Chapman 「What Bird is That?」
...When he takes to the water, it is necessary thatthose who have otter-spears should watch the bubbles, for he generallyvents near them...
Edward Jesse 「Anecdotes of Dogs」
...It is the circular ocean, the tideless water, whereon our boldest and most independent thoughts will never be more than mere abject bubbles...
Maurice Maeterlinck 「The Life of the Bee」
...“The next moment we passed the mouth of a good-sized creek, whose waters, having just leaped a fall of several feet, ran into the river, covered with white froth and bubbles...
Mayne Reid 「The Hunters' Feast」
...The membersof the Hunt stood watching the bubbles,filled by his breath, as they floated up andbroke...
Alfred W. Rees 「Creatures of the Night」
...Continuing this operation, the surface will generally become covered withsmall yellow bubbles which soon disappear, leaving the image clear anddistinct...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...Slowly, thin chains of bubbles rising behind them,they sank towards the dim shape of the NX-1 below...
Various 「Astounding Stories, February, 1931」
...No bubbles arise from the tiny hole where the used air is forcedinto the water...
Various 「Astounding Stories of Super-Science September 1930」
ランダム例文：
illustration periods impatient
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