In the meanwhile, a little ameliorative labor legislation was being passed by state legislatures and by Congress. A Massachusetts law of 1866 forbade the employment of children under ten years of age in manufacturing establishments, prohibited the employment of children between the ages of ten and fourteen for more than eight hours per day, and provided that children who worked in factories must attend school at least six months in the year. In 1868 a federal act constituted eight hours a day's work for government laborers, workmen and mechanics, but some doubt arose as to the intent of part of it and the law was not enforced. In many states eight-hour bills were introduced, but were defeated in all except six, of which Connecticut, Illinois and California were examples, and even in these cases the laws were not properly drawn up or were not enforced. In 1869 a Bureau of Statistics of Labor was established in Massachusetts which led the way for similar enterprises in other states. It collected information concerning labor matters and reported annually to the legislature. In 1874 a Massachusetts ten-hour law forbade the employment of women and minors under eighteen for more than sixty hours a week, although refraining from the regulation of working hours for men. In 1879, in imitation of English factory acts, Massachusetts passed a general law relating to the inspection of manufacturing establishments. It provided that dangerous machinery must be guarded, proper ventilation secured, elevator wells equipped with protective devices and fire-escapes constructed. Other states followed slowly, but legislation was frequently negatived by lack of effective administration. In brief, then, agitation previous to 1877 had resulted in the passage of a few protective acts, but even these were restricted to a few states and were not well enforced. It was, therefore, more than a mere coincidence that the first general strike movement spread over the country in this same year, 1877.