This section is from the book "Applied Science For Metal Workers", by William H. Dooley. Also available from Amazon: Applied Science For Metal Workers.
The Drummond light is produced by exposing small pieces of lime to ignition in a blowpipe. Oxygen and hydrogen gases are directed upon the ball or disk of lime from separate vessels or gasometers through a flame arising from alcohol. This light, invented by Captain Drummond, is probably the most powerful known, and can be seen a distance of 30 miles. It is now much used for light-houses.
 
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