Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 183
contracted aperture a, shall be bare §th of an inch above the top of the wick-holder. This relative posi-tion is observed in all the burners. This form of cone box was found very inconvenient, by becomingexceedingly hot and throwing a considerable shadow, it was consequently soon superseded by…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
