Each state chemist shall analyze all samples of alcoholic liquor presented to him for that purpose by any legal officer and keep a record of all such samples, stating the kind of liquor, the name and address of the person from whom he received it and the result of his analysis. Copies of records of any analysis of liquors, made by a state chemist or a United States government chemist and certified by him, shall be legal evidence of the facts stated in such records.