This is a writ of error to the supreme court of the state of Iowa, allowed by the chief justice thereof, upon the ground that the judgment in the case affirmed the validity of a statute of that state, which the plaintiff in error claimed to be in conflict with the federal constitution. The case arose upon a petition in equity, filed December 24, 1885, in the circuit court of Polk county, Iowa, by defendants in error, I. E. Pearson and S. J. Loughran, against the plaintiff in error, J. S. Kidd...