Tubular Lanterns are roughly classified under the captions "Hot Blast" and "Cold Blast." Dietz (Rhymes with beets)  made the first "Hot Blast" Lanterns in 1868, and the first "Cold Blast" Lanterns in 1880.  The terms "Hot Blast" and "Cold Blast" are used solely in conjunction with tubular Lanterns and with regard to the method of supplying air to the flame.  All other lanterns made are classified as "Dead Flame," which are nothing more than an enclosure to protect  the flame, as no air circulation is provided.  Dead Flame examples include the Adlake #300 Kero or Dietz #041  Railroad Lanterns.   All tubular Hot Blast and Cold Blast lanterns will self extinguish if tipped over.  This safety feature is not found in any other other type of oil burning lamp or lantern! Hot Blast Lanterns are so constructed that a supply of fresh air enters the globe at the base through the openings in the perforated globe plate. This fresh air, in ascending through the globe, becomes heated by the flame and mingles with the hot products of combustion. A portion of this mixture of hot air and spent gases passes into the bell or canopy over the globe and through the sides tubes via downdraft to the air chamber beneath the burner, there directly supplying the flame. This design produces a steady yellow flame.  Inherent in the design of the Hot Blast Lantern, the burning time is approximately 10% greater than a Cold Blast Lantern of the same wick size.  Also, due to the re-circulating of the products of combustion, the Hot Blast Design is especially well suited for use indoors. Cold Blast Lanterns are so constructed that the supply of air taken through the side tubes does not mingle with the products of combustion and the flame is supplied with fresh air both through the globe plate and the side tubes. The spent products of combustion escape to the outer air through a central metal chimney in the Lantern head. From an air chamber surrounding the metal chimney, which is provided with injectors for taking in fresh air, fresh air is taken into the side tubes, down which it flows to the lower air chamber and thus to the burner.  The "Cold Blast" Lantern design produces a perfectly white flame and approximately twice the volume of light of a "Hot Blast" Lantern with the same size wick.  This fact has rendered the "Cold Blast" Lantern a favorite with users.  With the advent of modern fuels, Cold Blast lanterns can be used inside or out.