pendulating

-- Ditto in a crimson waistcoat, and a pendulating eye-glass.

Punch, or the London Charivari, Volume 1, October 9, 1841 Various

The man retired amongst the crowd, the woman was soon a dead corpse, pendulating in the wind.

Sarah Polgrain 1921

Ten months in the year he paid no attention to politics, pendulating daily between his house and his office.

In Our Town William Allen White 1906

The width of the bands increases if the speed of the revolving disc decreases, but varies directly, as was before noted, with the speed of the pendulating rod.

Harvard Psychological Studies, Volume 1 Containing Sixteen Experimental Investigations from the Harvard Psychological Laboratory. Various 1889

So saying, the Slogger, turning round, walked quickly away, and his little friend entered the class-room in a state of mind pendulating between disgust and despair, for he had no expectation of seeing the slippery Slogger again that night.

My Doggie and I 1859

Over this supperlet they were all very talkative and merry, with the exception, poor fellow, of Glumm, who sat sometimes glancing at, and always thinking of, Ada, and pendulating, as usual, between the condition of being miserably happy or happily miserable.

Erling the Bold 1859