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

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

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

Whence comes this man with his new poetry, which confounds the critics? and that man with his subtile wit borrowed from no school?

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

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

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

No, his temperament needed a subtiler atmosphere than this, rarer essence than mere brutal freedom The East, the Old World, was his proper sphere for self-development.

From Margret Howth, a Story of To-day by Rebecca Harding Davis

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

It was this mastery of the interior life, this impassioned voicing of its subtilest secrets, that made Rousseau so irresistibly attractive to women.

From The Friendships of Women by William Rounseville Alger

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

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

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