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

Nor wanting was the choral song, Swelling in silvery chimes of sweetness; To sound of which this subtile throng Advanced in playful grace and fleetness.

From Fairy Legends and Traditions of The South of Ireland by Crocker, T. Crofton

We find doctors in the first ages speaking to us of God and the soul as material substances, more subtile indeed than ordinary bodies.

From Ecce Homo! A Critical Inquiry into the History of Jesus of Nazareth: Being a Rational Analysis of the Gospels by Holbach, Paul Henry Thiry Baron d'

Gage Well said, but will this subtile reasoning stand?

From The Poems of Philip Freneau, Volume I (of III) by Freneau, Philip

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

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 Davis, Rebecca Harding

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

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 Bellamy, Edward

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

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

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 Landor, Walter Savage

As for me, Abraham, Isaac, and Jacob are now only the subtilest imaginable essences, which would not stain the morning sky.

From A Week on the Concord and Merrimack Rivers by Thoreau, Henry David

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

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