“ But it is equally true that a judgment in a prior action is admissible, even against a stranger, as prima facie, but not conclusive, proof of a fact which may be shown by evidence of general reputation, such as custom, pedigree, race, death, and the like, and this because the judgment is usually more persuasive than mere evidence of reputation. ”

“ The petition did not allege that the acts charged against the construction company were knowingly done, and it is said that this operated to render the recovery erroneous. No doubt the petition was defective. A right to the penalty arises only where § 4 is violated 'by knowingly assisting, encouraging, or soliciting the migration or importation' of an alien contract laborer into the United States. Knowledge being an element of what is penalized, it must be included in the statement of a cause of action for the penalty. ”

“ That the following classes of aliens shall be excluded from admission into the United States: . . . persons hereinafter called contract laborers, who have been induced or solicited to migrate to this country by offers or promises of employment, or in consequence of agreements, oral, written, or printed, express or implied, to perform labor in this country of any kind, skilled or unskilled ”