THE SUN AND THE TRAIN.

George Stephenson and a friend were once looking at a train. Trains in those days were not so common as they are now, and George asked his friend what he thought propelled or drove the train along. His friend answered, 'Probably the arm of some stalwart north-country driver.'

'No,' said George; 'it is the heat and light of the sun which shone millions of years ago, which has been bottled up in the coal all this time, and which is now driving that train.'