Investigation of cottonseed industry. Letter from the chairman of the Federal trade commission transmitting, in response to Senate resolutions no. 136 and no. 147, certain information relative to an investigation of the charges that certain corporations, operating cottonseed-oil mills, are violating the antitrust laws with respect to prices for cottonseed and acquiring the ownership or control of cotton gins. Filed with the secretary of the Senate October 7, 1930[-May 19, 1933]