Section 568.07 - Name sufficient proof; competency of witness(1) In every prosecution for a violation of this chapter, proof that the liquor in question was and is known as whiskey, moonshine whiskey, shine, rum, gin, or brandy or by any other similar name or names shall be prima facie evidence that such liquor is intoxicating and contains more than 6.243 percent of alcohol by volume and that such content is intoxicating. Any person who by experience in the past in the handling or use of intoxicating liquors, or who by taste, smell, or the drinking of such liquors, has knowledge as to the intoxicating nature of such liquors may testify as to this opinion, whether such beverage or liquor is or is not intoxicating; and a verdict based upon such testimony shall be valid.(2) The alcoholic content of any liquor, wine, or beer, or other beverage, may be shown by hydrometer or gravity test made in or away from the presence of the jury by any person who has knowledge of the uses of such instruments, but the production of such evidence shall be optional. The alcoholic content of any liquor or beverage, or compound, which is the subject of any inquiry in any proceedings or prosecution may also be shown by chemical analysis or any other analysis made by and certified by any competent chemist. The sample analyzed may be identified by the sworn testimony of any peace officer or prosecuting officer, that he or she personally delivered to such chemist such sample for analysis and that it was personally taken by him or her from the receptacle containing the beverage, drink, or alcoholic liquor or compound which is the subject of inquiry.(3) The mode of proof herein provided shall be considered cumulative and not exclusive.s. 7, ch. 18016, 1937; CGL 1940 Supp. 7648(16); s. 3, ch. 84-299; s. 19, ch. 86-269; s. 49, ch. 91-220; s.100, ch. 92-291; s.881, ch. 97-103.