... “No, I cannot,” he said, after an almost imperceptible moment of hesitancy; “but we shall see him to-morrow... 
Baroness Orczy 「El Dorado」
...It had been an almost imperceptible action on her part and certainly an involuntary one, for she did not wish to betray a single thought or emotion, until she knew what he wished to say...
Baroness Emmuska Orczy 「The Elusive Pimpernel」
... But in the lapse of a long series of years, by a progression slow, and for a time almost imperceptible, we had become rich in a variety of acquirements...
Thomas Clarkson 「The History of the Rise, Progress and Accomplishment of the」
...Mingled with her anger and annoyancewas an almost imperceptible tremor offear which made her catch her breath...
Various 「Ainslee's magazine, Volume 16, No. 2, September, 1905」
... Now, this imperceptible usurpation of property by the commonalty was inspired by religion...
P. J. Proudhon 「What is Property?」
...For minutestogether he stood perfectly still, and his movements, as a rule, wereeither so slow as to be all but imperceptible, or so rapid as almost toelude the eye...
Bradford Torrey 「The Foot-path Way」
... the imperceptible larva canrecognize...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
...Perhaps the effluvia of thegamy tit-bit have reached them, coming from afar, imperceptible to anyother sense than that of the Sexton-beetles...
J. H. Fabre 「The Wonders of Instinct」
..." Their flight is easy and apparently performed withouteffort and with an almost imperceptible movement of wing...
Various 「Natural History in Anecdote」
...Milton shot suddenly a glance at the two by thewall, and his head nodded in an almost imperceptible signal...
Various 「Astounding Stories, April, 1931」
...Praed seemed to be fighting, at anyrate! As he watched, the two scouts catapulted still higher; becametiny, almost imperceptible dots, visible only in the reflected lightof the flares...
Various 「Astounding Stories, February, 1931」
...e saw a nearly imperceptible glance pass between the footman and themajor-domo...
Various 「Astounding Stories of Super-Science, May, 1930」
...But thestars are all so distant that their annual displacement of perspectiveis almost imperceptible, and very exact instruments are required for itsdetection...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...The exact moment of the origin of a sun-spotcannot be ascertained, because it arises from an imperceptible point; itgrows very rapidly, and often attains its full size in a day...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...So the perturbing power ofsuch a mass on distant bodies is imperceptible...
Oliver Lodge 「Pioneers of Science」
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