The duties of the Department of Labor, or Bureau of Labor, "to ascertain, at as early a date as possible, and whenever industrial changes shall make it essential, the cost of producing articles at the time dutiable in the United States, in leading countries where such articles are produced, by fully specified units of production, and under a classification showing the different elements of cost, or approximate cost, of such articles of production, including the wages paid in such industries per day, week, month, or year, or by the piece; and hours employed per day; and the profits of manufacturers and producers of such articles; and the comparative cost of living, and the kind of living; what articles are controlled by trusts or other combinations of capital, business operations, or labor, and what effect said trusts, or other combinations of capital, business operations, or labor have on production and prices", are, as of August 23, 1912, transferred to and shall be discharged by the Bureau of Foreign and Domestic Commerce, and it shall be also the duty of said Bureau of Foreign and Domestic Commerce to make such special investigation and report on particular subjects when required to do so by the President or either House of Congress.