Innubilous

No, 'tis a THOUGHT sprung ftom^([sic]) a ray divine, Which will through clouds of lowring critics shine: When in a clear innubilous serene, The soul's abstracted, purg'd from dross and spleen;

Through bright, innubilous, transparent skies, the sun pours fire that heats the rocks as by the breath of a furnace[…]

With the future in their blood, their innubilous optimism sees little other than the eventual success and the ultimate importance of their researches.