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

Of a more subtile wit and a finer grain was Harte, who did his best work as a humorist in California.

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

The question at issue here is one of those profound and subtile ones which cannot be approached by argument, but can be decided only by a seeing.

From Know the Truth; A critique of the Hamiltonian Theory of Limitation by Jesse H. Jones

For subtile pleasantry was there, And brilliant flash of wit; Now, pleading eyes were raised in prayer, And now with smiles were lit.

From Poems by Arthur Macy

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

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

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

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

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

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

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

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

What stuff is the man made of who is not coexistent in our thought with the purest and subtilest truth?

From The Atlantic Monthly, Volume 12, No. 72, October, 1863 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