“It is very doubtful whether the thunderbolt, in destroying the tree, would have spared us. It is impious boldness to expose one’s self to peril without a motive, and then to throw upon Providence the task of extricating us from our perilous situation. Heaven will help him who helps himself. We helped ourselves by fleeing from the dangerous tree, and we arrived home safe. But to help oneself effectively requires knowledge; so, to impress these things well on your mind, I emphasize once more the danger that, in time of storm, lurks in high towers, steeples, lofty buildings, and, above all, in tall and isolated trees. As for other precautions that are commonly recommended, such as not to run, in order not to cause a violent displacement of the air, and to shut the doors and windows in order to prevent a draught, they are of no value whatever: the direction taken by the thunderbolt is in no way affected by the air-currents. Railway trains, which run at high speed and displace the air with so much violence, are not more exposed to lightning than objects at rest. Every-day experience is a proof of it.” “When it thunders,” said Emile, “Mother Ambroisine hurries to shut all the doors and windows.” “Mother Ambroisine is like a great many others who believe they are safe as soon as they cease to see the peril. They shut themselves up so as not to hear the thunder nor see the lightning; but that does not in the least lessen the danger.” “Then there are no precautions to be taken!” asked Jules. “In the usual circumstances, none, unless it be this precaution: to be of good heart and rely on the will of God. “To protect tall buildings, more menaced than others, we use a lightning-conductor, a wonderful invention due to Franklin’s genius. The lightning-conductor is composed of a rod of iron, long, strong, and pointed, fastened to the top of the building. From its base starts another rod, also of iron, which runs along the roofs and walls, where it is fastened with staples, and plunges into damp ground or, better still, into a deep well of water. If a thunderbolt falls, it strikes the lightning-conductor, which is the nearest object to the cloud as well as the best suited to the electric current on account of its metallic nature. Besides, its pointed form has much to do with its efficacy. The bolt that strikes the metal lightning-conductor follows it and is dissipated in the depths of the earth without causing any damage.” ------------------------------------------------------------------------ CHAPTER XL EFFECTS OF THE THUNDERBOLT