CHAPTER IV
THE SELECTION OF AN ACETYLENE GENERATOR
In Chapter II. an attempt has been made to explain the physical and
chemical phenomena which accompany the interaction of calcium carbide and
water, and to show what features in the reaction are useful and what
inconvenient in the evolution of acetylene on a domestic or larger scale.
Similarly in Chapter III. have been described the various typical devices
which may be employed in the construction of different portions of
acetylene plant, so that the gas may be generated and stored under the
best conditions, whether it is evolved by the automatic or by the non-
automatic system. This having been done, it seemed of doubtful utility to
include in the first edition of this work a long series of illustrations
of such generators as had been placed on the markets by British, French,
German, and American makers. It would have been difficult within
reasonable limits to have reproduced diagrams of all the generators that
had been offered for sale, and absolutely impossible within the limits of
a single hand-book to picture those which had been suggested or patented.
Moreover, some generating apparatus appeared on the market ephemerally;
some was constantly being modified in detail so as to alter parts which
experience or greater knowledge had shown the makers to be in need of
alteration, while other new apparatus was constantly being brought out.
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