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

Ladislaus, after a considerable loss of blood and a somewhat lengthy confinement in bed, looked pale and miserable, but his countenance had acquired a more subtile expression and actually become handsome.

From Whirlpools A Novel of Modern Poland by Henryk Sienkiewicz

Every one is the symbol of wisdom, and hath, in its malic acid, a subtile essence, which carries health to the morbid liver.

From A Breeze from the Woods, 2nd Ed. by William Chauncey Bartlett

Still softly we proceeded to another door within, which I had not discovered, and he touched that too with an air of subtile and still authority.

From Charles Auchester, Volume 1 of 2 by Elizabeth Sheppard

That cause of motion he makes the Materia Subtilis; and the finer or subtiler that is, the better and fitter he conceives it to be to preserve Motion.

From Philosophical Transactions of the Royal Society - Vol 1 - 1666 Giving some Accompt of the present Undertakings, Studies, and Labours of the Ingenious in many considerable parts of the World by Henry Oldenburg

Bread is a binder, and for that abolisht even in their Ale, whose lost room fills an apple, which is more airy and of subtiler nature.

From The Scornful Lady by John Fletcher

Gradually he wove a drama round it; line by line it took shape for a book that was to be subtiler, finer and more sincere than anything that he had ever written.

From The Education of Eric Lane by Stephen McKenna

What if, through communication with subtiler organisms than my own, I could reach at a single bound the goal, which perhaps a life of agonizing mental toil would never enable me to attain?

From The Atlantic Monthly, Volume 01, No. 03, January, 1858 by Various

It is the subtiler nature of doubt to penetrate the heart more profoundly than confidence, and to underlie it.

From Two Days' Solitary Imprisonment 1898 by Edward Bellamy

Truth is a point; the subtilest and finest; harder than adamant; never to be broken, worn away, or blunted.

From Imaginary Conversations and Poems A Selection by Walter Savage Landor

Of the most noysom poyson that euer was mingled with the subtilest druggs that euer were.

From The Palace of Pleasure Volume 3 by William Painter

But if you watch it attentively, you will find it ever changing, though with subtilest refinement, ever human, and true to the great laws of emotion.

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

He was the farthest reach of subtlety compatible with an individual self,--the subtilest of authors, and only just within the possibility of authorship.

From Beacon Lights of History, Volume 13 Great Writers; Dr Lord's Uncompleted Plan, Supplemented with Essays by Emerson, Macaulay, Hedge, and Mercer Adam by John Lord

At some far-away period in childhood it got imbedded in my fancy, and in process of time had acquired that subtilest, indefinable fascination which belongs only to imaginative reminiscence.

From The Atlantic Monthly, Volume 15, No. 88, February, 1865 by Various