It is easy to make, easy to manage, practically
indestructible, and for commercial purposes has, I think, a general
adaptability which will bring it, in one form or another, into almost
universal use. I may say that when we are in a special fix, this has in
every case landed us out of the difficulty.
For heating large plates of metal equally, for drying paper impressions
for stereotypers, hot pressing hosiery, crumpet baking, working up
plastic masses which can only be worked hot, and work of this class, a
number of separate flames equally diffused under the whole surface of
the plate are necessary to equalize the heat, unless the plate is very
thick, and these are better if produced by a mixture of gas and air; but
in heating wide plates one difficulty must always be remembered, the
burnt gases from the center flames can only escape by passing over the
outer flames, and therefore a space must be left between the top of the
flame and the plate, or the outer flames will be smothered and make a
most offensive smell.
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