Any closed, orientable, connected manifold is a Poincaré space.

I can't believe you've got a hot chick in that ratty apartment with you.

Towres, Cities, Kingdomes ye would ruinate, / In your auengement and dispiteous rage […].

For use with petrol-electric, and subsequently diesel-electric, vehicles, air horns were developed about 1918, and today they vary from single-note instruments to those producing as many as five chiming pitches.