Arkwright was a barber; Hargreaves was a mechanic; George Stephenson was a steam engine stoker. Since the days of Newton, science made a triumphant march. Huygens (undulatory theory of light); Musschenbroek (Leyden Jar); Buffon (modern geology); Black (latent heat); Lavoisier (modern chemistry); Herschel (the astronomer); Laplace (the mathematician); Volta (electric current);