American pure food and drug laws : comprising the statutes of the United States and of the several states of the Union on the subject of foods and drugs, their manufacture, sale and distribution, whether in interstate or foreign commerce, the administrative rules and regulations of the federal and state departments and commissioners, and the standards of purity, etc.; to which are added chapters on related subjects, such as insecticides and fungicides, commercial feeding stuffs, etc., with full editorial commentaries and numerous citations to federal and state decisions ... / By James Westervelt ...