subtile

Recent scientific discoveries have conferred upon man new powers of investigation, whereby nature has been made to reveal secrets so subtile that they never had been dreamt of before in philosophy.

From Scientific American ● Jan. 13, 2013

At Paris the Universe is seen, compos’d of Vortices of subtile Matter; but nothing like it is seen in London.

From "The Invention of Science" by David Wootton

One seeks to accommodate one's self to her doctrine through subtile distinctions.

From The Catholic World; Volume I, Issues 1-6 A Monthly Eclectic Magazine by E. Rameur

Not by any altruistic agency we may be certain, as we watch the selfish, irritable little beings, but by subtile scent, or as with the vultures, by the jealous watching of each other's actions.

From Jungle Peace by William Beebe

The mental attitude of the speaker is subtile enough in itself to be fascinating, but the real suspense does not lie there.

From Shelburne Essays, Third Series by Paul Elmer More

The heavens change by a subtiler movement than the precession of the equinoxes.

From The Atlantic Monthly, Volume 04, No. 23, September, 1859 by Various

No, his temperament needed a subtiler atmosphere than this, rarer essence than mere brutal freedom.

From The Atlantic Monthly, Volume 08, No. 50, December, 1861 by Various

We rather think that far subtiler things than the doctrine of association had from of old been familiar to him.

From Life of Robert Burns by Thomas Carlyle

The Reflexion must have rather been caused by a subtiler Medium, which could recede through the Glasses at the creeping in of the Water.

From Opticks or, a Treatise of the Reflections, Refractions, Inflections, and Colours of Light by Sir Isaac Newton

Is not the Heat of the warm Room convey'd through the Vacuum by the Vibrations of a much subtiler Medium than Air, which after the Air was drawn out remained in the Vacuum?

From Opticks or, a Treatise of the Reflections, Refractions, Inflections, and Colours of Light by Sir Isaac Newton

He saw it was lovable, and he made it the theme of his noblest poems, his subtilest philosophies, and his highest Art.

From The Atlantic Monthly, Volume 07, No. 44, June, 1861 Creator by Various

A book might be written on the Stratagems of Literature, as Frontinus has composed one on War, and among its subtilest heroes we might place this great poet.

From Calamities and Quarrels of Authors by Isaac Disraeli

The notion of nonentity may thus be called the parent of the philosophic craving in its subtilest and profoundest sense.

From The Will to Believe : and Other Essays in Popular Philosophy by William James

In such spaces he may dream his dreams, tell his stories, and stamp on them for centuries his subtilest and divinest thoughts.

From Scientific American Supplement, No. 799, April 25, 1891 by Various

She took yellow honeysuckles from a vase of massed amethyst and began to weave them in her yellow hair,—humming a tune, the while, that was full of the subtilest curves of sound.

From The Atlantic Monthly, Volume 11, No. 67, May, 1863 by Various