ETHER

Wed, 25 Dec '24

Upper atmosphere

Fri, 23 Feb '24

Early number?

Fri, 31 Mar '23

Heavens

Thu, 15 Dec '22

Anesthetic since the 1840s

Fri, 1 Apr '22

Upper atmosphere

Thu, 17 Mar '22

Air up there

Sun, 27 Feb '22

Onetime dentist's supply

Sun, 19 Dec '21

Reduce in volume / As new

Sat, 18 Dec '21

Heavens

Sat, 17 Apr '21

Clear sky

Thu, 8 Apr '21

Upper atmosphere, with "the"

Fri, 26 Mar '21

Fifth element, to Aristotle

Wed, 13 Jan '21

Thin air