Harlan F. Stone

“ General Laws, providing that an employer not electing to comply with that act by effecting the prescribed insurance for the benefit of his employees, as petitioner had failed to do, may not interpose these defenses in an action brought by an employee to recover for injuries sustained in the course of his employment. ”

“ Petitioner also urges that, as the insurance provisions of the act, as interpreted by the state court, require the premiums to be based on so much of its payroll as may be allocated to the hours of employment in intrastate commerce, a burden is imposed on interstate commerce by the difficulty, if not impossibility, of making the allocation. ”

“ The interstate commerce clause did not withdraw from the states the power to legislate with respect to their local concerns, even though such legislation may indirectly and incidentally affect interstate commerce and persons engaged in it. ”