In compiling this work on the uses and application of acetylene, the
special aim of the authors has been to explain the various physical and
chemical phenomena:

(1) Accompanying the generation of acetylene from calcium carbide and
water.

(2) Accompanying the combustion of the gas in luminous or incandescent
burners, and

(3) Its employment for any purpose--(a) neat, (b) compressed into
cylinders, (c) diluted, and (d) as an enriching material.

They have essayed a comparison between the value of acetylene and other
illuminants on the basis of "illuminating effect" instead of on the
misleading basis of pure "illuminating power," a distinction which they
hope and believe will do much to clear up the misconceptions existing on
the subject. Tables are included, for the first time (it is believed) in
English publications, of the proper sizes of mains and service-pipes for
delivering acetylene at different effective pressures, which, it is
hoped, will prove of use to those concerned in the installation of
acetylene lighting systems.

_June_ 1903

NOTE TO THE SECOND EDITION

The revision of this work for a new edition was already far advanced when
it was interrupted by the sudden death on April 30, 1908, of Mr. F. H.