"All right," said Fred, "go on." "The lamp is only a simple oillamp," said Will. "But the clever part of it is that the flame is shut in all round with wire gauze. Every man lights his lamp and locks it up before he goes down. It must not be opened. The flame burns inside, but it cannot get out to the bad gas in the mine. This makes it quite safe for the men. The lamp is called the Safety Lamp.""How clever the man must have been who thought of it!" said Norah. "Yes, he was," said Fred. "Hisname was Davy, and the lamp is still called the Davy Lamp."SUMMARY
The great mass of coal down in the mine is always giving out gas. This gas will explode if a ?ame comes near it. The men use the Davy lamp, and they are quite safe, for the ?ame is shut in all round with wire gauze.
Lesson 39
Flowers
