The pesent Ordinance contains at the outset a definition clause relating to the various terms therein employed. Part 3 deals with the requirements of feedstuffs made out of one substance only, while Part 3 relates to feedstuffs made out of more than one substance. A list of authorized additives to feedstuffs is contained in Part 4. All the additives contained in feedstuffs must be shown on the packing. Certain substances are not to be used in the production of feedstuffs. The Ordinance consists