"Concerning the technical process for the production of ceresine, it
should be said that, when the industry was new (the production of
ceresine has been known only about eight years, since 1874), it was
controlled by patents, which are kept secret. This much is known, that
the color and odor are removed by fuming sulphuric acid.

"From mineral wax of good quality about 70 per cent. of white ceresine
is obtained. The yellow ceresine is tinted by the addition of coloring
matter (annatto).

"(b.) _Paraffine_, a firm, white, translucent substance, without odor.
It is used, chiefly, in the manufacture of candles, and also as a
protection against the action of acids, and to make casks and other
wooden vessels water-tight, for coating corks, etc., for air-tight
wrappings, and, finally, for the preparation of tracing paper. There
are several methods of obtaining paraffine from ozokerite (see the
Encyclopedic Handbook of Chemistry, by Benno Karl and F. Strohmann, vol.
iv., Brunswick, 1877).

"The details of the technical process consists, in every case, in the
distillation of the crude material, pressure of the distillate by
hydraulic presses, melting, and treating by sulphuric acid.

"In the manufacture of paraffine from ozokerite, there are produced from
2 to 8 per cent. of benzine, from 15 to 20 per cent. of naphtha, 36
to 50 per cent. of paraffine, 15 to 20 per cent. of heavy oil for
lubricating, and 10 to 20 per cent. of coke, as a residue.

"(c.) _Mineral oils_, which are obtained at the same time with