Energetically at work.

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1850.  [This] will be sufficient to keep all the elements of agitation in full blast at the North.—Mr. Bell of Tennessee, U.S. Senate, July 5: Cong. Globe, p. 1096, Appendix.

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1858.  We found an old man blowing the bellows of the organ, which was in full blast in the church.—Hawthorne, ‘Fr. and It. Journals,’ ii. 143. (N.E.D.)

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