Ethane and ethylene are
undoubtedly formed, and certain homologues of them and of acetylene, as
well as benzene and a high molecular hydrocarbon (C_7H_6)_n termed
"cuprene," have been found by different investigators. Nearly the same
hydrocarbons, and others constituting a mixture approximating in
composition to some natural petroleums, are produced when acetylene is
passed over heated nickel (or certain other metals) obtained by the
reduction of the finely divided oxide. These observations are at present
of no technical importance, but are interesting scientifically because
they have led up to the promulgation of a new theory of the origin of
petroleum, which, however, has not yet found universal acceptance.
CHAPTER VII
MAINS AND SERVICE-PIPES--SUBSIDIARY APPARATUS
The process by which acetylene is produced, and the methods employed for
purifying it and rendering it fit for consumption in dwelling-rooms,
having been dealt with in the preceding pages, the present chapter will
be devoted to a brief account of those items in the plant which lie
between the purifier outlet and the actual burner, including the meter,
governor, and pressure gauge; the proper sizes of pipe for acetylene;
methods of laying it, joint-making, quality of fittings, &c.
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