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

He will come very near to us in his books, and by that subtile law of communion which, through the brightest and noblest utterances, makes all the better world akin.

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

For Eutychius,149 bishop of that city, taught, that our body, in the glory of resurrection, would be impalpable, and more subtile than wind and air.

From Bede's Ecclesiastical History of England by Bede, Cuthbert

The Moment, continued I, that any Particles of Air or Fire more subtile and agitated than others rise, an equivalent Portion of others must necessarily descend at the same time to supply their Place.

From The Travels and Adventures of James Massey by Patot, Simon Tyssot de

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 Newton, Isaac, Sir

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 Oldenburg, Henry

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

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 Fletcher, John

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

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 Alger, William Rounseville

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

From The Palace of Pleasure Volume 3 by Painter, William

Said to us, during the past season, the subtilest thinker of Great Britain,—"I must send to America whatever I wish to put in print, unless I pay for its publication from my own pocket."

From The Atlantic Monthly, Volume 02, No. 12, October, 1858 by Various

I can say, from an experience of over a dozen years, that pupils between twelve and fifteen years of age are immensely interested in such discussions, and are capable of making the subtilest distinctions.

From The Moral Instruction of Children by Adler, Felix