Jules Verne,
The Mysterious Island
“ Then Pencroff, although he had no confidence in the result, tried rubbing two pieces of dry wood together, after the manner of the savages. It is true that the motion of the man, if it could have been turned into heat, according to the new theory, would have heated the boiler of a steamer. But it resulted in nothing except putting him in a glow, and making the wood hot. After half an hour’s work Pencroff was in a perspiration, and he threw away the wood in disgust. ”
