At about the same time Boyle investigated several acids; he established their general reddening of litmus, their solvent power of metals and basic substances, and the production of neutral bodies, or salts, with alkalies.
Special effects such as a reddening sky at sunset or a dark cloud bringing rain are very well done.
Nonsense! cried the count, suddenly reddening with an apoplectic flush over neck and nape as old people do.
Tattered, blue-purple clouds, reddening in the east, were scudding before the wind.