rates and also of the unionist employees of such employers. The
log was served for the purpose of creating a dispute so as to give
the court jurisdiction to deal with this problem. After consideration
of the position, the union determined to make the claims which were
set out in the log and, if those claims were refused, to take the matter
to the court in order to obtain an award. As I have already said,
the body of the plaint is identical with the terms of the log. Evidence
has been placed before the court relating to controversies between
the parties before the log was served. In my opinion this evidence
cannot be used either for the purpose of limiting or for the purpose
of extending the dispute which arose from the demand for and
refusal of the claims in the log. The claimant union chose to make
and to submit to the court just those claims and no others. The
very object of action by formal demand (i.e., a log) and plaint, is
to define and to identify the matters in dispute. This is a well-
understood practice. It affords the maximum liberty to a party
to frame its claims as it thinks proper, so that the party upon whom
the claims are made will know what the matters are in respect to
which the jurisdiction of the court is invoked. Where, as in this
case, procedure is by plaint, the only dispute of which the court
obtains cognizance, and the only dispute with which it can deal by
virtue of the plaint, is the dispute defined in the plaint. So, also,
when a dispute which a party has chosen to identify and specify by
a log or a plaint is referred into court under sec. 19 (d) of the Act,
the court can, by virtue of this order of reference, deal only with
the dispute so identified and specified. Therefore, the question
for decision in this case reduces itself, in the first instance, to a
question of the interpretation of the log as repeated or embodied in
the plaint.