Famous quotes containing the words air and/or system:
“The evergreen woods had a decidedly sweet and bracing fragrance; the air was a sort of diet-drink, and we walked on buoyantly in Indian file, stretching our legs.”
—Henry David Thoreau (1817–1862)
“Science is a system of statements based on direct experience, and controlled by experimental verification. Verification in science is not, however, of single statements but of the entire system or a sub-system of such statements.”
—Rudolf Carnap (1891–1970)