Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 175
erminating above in a thick ring, two or three lines wide, which rests upon the edge olthe cylinder c, this being purposely made lower, and the whole is thus brought up to the full height olthe burner. In this ring the supports for the chimney are fixed. If these are turned with the hand, dis…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
