It is the presence of this gas that necessitates the safety-lamp.
This safety-lamp of the miner not only shows the presence of gas, but prevents its explosion.
But the most picturesque figure was the illustrious inventor of the safety-lamp.
The wire cylinder of Saffran's safety-lamp was filled to the very top with a red flame.
A safety-lamp hung at his belt, also a large, strong knife in a leather sheath.
Each one had a safety-lamp fastened to his belt and wore a thick felt hat.
The flame of a safety-lamp is drawn down until it shows only a small yellow tip.
For months he investigated and experimented, and at length, in 1815, he constructed what he called the safety-lamp.
The advertised object of the meeting was to present him with a reward for “the invention of his safety-lamp.”
The advertised object of the meeting was to present him with a reward for the invention of his safety-lamp.