When bullets whiz by and hit things, the speakers act up.
Apparently the horse knew the rider meant business, because it didn't act up again.
The new doctrine, loudly proclaiming the discovery of a " Natural" System, led away many from the steady practice which should have followed the teaching of Cuvier (though he in ornithology had not been able to act up to the principles he had lain down) and from the extended study of Comparative Anatomy.
He had, however, the courage to act up to his own professions in collocating the rollers (Coracias) with the beeeaters (Merops), and had the sagacity to surmise that Menura was not a Gallinaceous bird.
On the 16th of September his disapproval of the popular excesses at Warsaw caused him to quit the government after sacrificing half his fortune to the national cause; but it must be admitted that throughout the insurrection he did not act up to his great reputation.
