From the official report of the U.S. government, prepared by the Commission of Labor in 1907, it appears that twenty States and Territories, including Porto Rico, have provisions against intimidation, of which the best example is the New York statute quoted above. Alabama and Colorado have express statutes against picketing, other than the general statutes against interference with employment. Nineteen other States, of which, however, only a few--Massachusetts, Michigan, Oregon, Texas, and Utah--are the same, have provisions against the coercion of employees in trading or industry, usually to prevent them from joining unions, but such statutes are also levelled against the compelling them to buy or trade in any shop, or to rent or board at any house. Five States have statutes prohibiting the hiring of armed guards other than the regular police, and especially the importing such from other States, Massachusetts and Illinois among the number, though none of the five are so radical as the later statute of Oklahoma quoted below. Statutes for the enforcement of the labor contract exist usually only in the South, but we find a beginning of similar legislation in the North, both Michigan and Minnesota having statutes making it a misdemeanor to enter into a labor contract without intent to perform it in cases where advances are made by way of transportation, supplies, or other benefits. The new anti-tip statute or law forbidding commissions to any servant or employee is to be found in Michigan, Wisconsin, and other States (see page 155 above). A few States require any employer to give a discharged employee a written statement of the reason for his discharge, but such statutes are probably unconstitutional. Colorado has the extraordinary statute forbidding employees to be discharged by reason of age. The common law of loss of service is strengthened generally in the Southern States by statutes against the enticing of employees. Public employment offices, as well as State labor bureaus, are now maintained in nearly all the States. Examinations and licenses are now required in the several States of electricians, engineers, horse-shoers, mining foremen, elevator operators, plumbers, railroad employees, stationary firemen and engineers, and street railway employees, in addition to the trades enumerated on page 147. All the Northeastern States except Maine and Vermont, and Maryland, Delaware, West Virginia, Alabama, Missouri, Tennessee, Wisconsin, Michigan, Illinois, Indiana, South Dakota, and Washington have general factory acts, and all the mining States have elaborate statutes for the safety of mines. New York and Wisconsin have statutes forbidding or making illegal labor unions which exclude their members from serving in the militia.