Every person who produces distilled spirits, or who brews or makes mash, wort, or wash, fit fordistillation or for the production of spirits, or who. by any process of evaporization,separates alcoholic spirit from any fermented substance, or who, making or keepingmash, wort, or wash, has also in his possession or use a still, shall be regarded as adistiller. Rev. St. U, S.