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A description of the safety lamp invented by George Stephenson, and now in use at Killingworth colliery. To which is added, an account of the lamp constructed by Sir Humphrey Davy. With engravings
A description of the safety lamp invented by George Stephenson, and now in use at Killingworth colliery. To which is added, an account of the lamp constructed by Sir Humphrey Davy. With engravings