e., the mother liquid) in which the paraffine exists. The change
effected in ozokerite and in petroleum residues when crystalline
paraffine is obtained by distillation is to be regarded as a
purification, and can be effected partially by treatment with amyl
alcohol. In the same way, by repeated treatment of petroleum residuum
with amyl alcohol, a substance of melting point 59 deg. C. can be
obtained, which cannot be distinguished from ordinary paraffine.
The treatment with amyl alcohol has therefore accomplished the same
results as was obtained by distillation, and the action is probably
the same, i.e., a partial separation of colloid substance. These
facts point to the conclusion that crystallizable paraffine exists
ready formed in both petroleum and in ozokerite, but in both cases
other colloidal substances prevent its crystallization. By
distillation, these colloids appear to be destroyed or changed so as
to allow the paraffine to crystallize.
It is a generally known fact that liquids always appear among the
products of the distillation of paraffine, no matter in what way the
distillation be conducted. This shows that some paraffine is
decomposed in the operation.
The name _proto-paraffine_ has been given to ozokerite and to the
paraffine of petroleum in contradistinction to _pyro-paraffine_, the
name that has been applied to the paraffine obtained by distillation
from any source.
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