Mass. Gen. Laws ch. 111, § 185: Disinfecting public mutoscopes and other apparatus

Section 185. The proprietor or manager of any place of public amusement or other place where there are provided for public use and entertainment mutoscopes or any other machine or apparatus of such nature that the person using the same breathes or speaks into it, or, to see or hear, holds any part thereof in contact with or near to his eyes or ears, shall disinfect the same, in such manner as shall be approved by the board of health, at least twice during such hours, in every twenty-four hours, as the machine or apparatus is offered for use by the public. This section shall not apply to telephones.