Section 166. The collection of samples of vinegar, as authorized by section three hundred and four, shall be made under the direction and supervision of the department of public health or by local boards of health. Samples may be purchased in the open market, and the stencillings, tags, brands or other markings upon the container shall be noted. Samples shall be divided into two substantially equal parts of at least sufficient volume to permit of a proper analysis as required by law, and at the time of the taking of the samples there shall be delivered to the owner or other person from whom the vinegar is taken one of the two above mentioned parts properly labelled with identifying marks and sealed with a seal, provided for that purpose, and a receipt therefor shall be given to the inspector or collector.