Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 185
3 … Camphene lamps.—It is only within the last few years that oil of turpentine or camphene has beensuccessfully introduced into general use as a source of illumination ; and it is by applying the principleof the solar cone in an extended manner that this highly carbonaceous substance can be completely…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.