Sentence:  Mesmer attributed all the phenomena of animal magnetism to the efflux and the influx of a subtle fluid conceived of as specifically localised in the magnet, but radiating also from stars and planets, sun and moon, the earth and the sky, and most effectively of all from the bodies of healthy and <WSD>viripotent</WSD> men. 
Meaning of the word marked with <WSD> tags:  Able to sire children; sexually mature.