Indeed, this cloudlessness must mean one of two things: either the temperature is so low that vapors can not exist in any considerable quantity, or the surface of Mars is so dry that there is little water or other liquid to be evaporated.
"A Text-Book of Astronomy"
George C. Comstock
They had come by heights and slopes of forest, where the serried stems of the tall firs showed brown and whitish-blue and grew straight as stalks of grain; and now on either side the farms opened under a sky of unwonted cloudlessness.
"Their Silver Wedding Journey"
William Dean Howells
In November, our friend said, taking breath for a fresh spurt of praise, there were a good many sympathetic afternoons which lent themselves to motor-bus progress up that magnificent avenue, and if you mounted to your place on top, about three o'clock, you looked up or down the long vista of blue air till it turned mirk at either vanishing-point under a sky of measureless cloudlessness.
"Imaginary Interviews"
W. D. Howells