Any public institution in this state may erect and maintain a crematory for the incineration after death of the bodies of those connected with the institution officially or as inmates, and such others as may be deemed advisable by the administrative head of such institution. Such crematories shall be erected, maintained and conducted in accordance with the provisions of this chapter, and all crematories shall be made subject to the restrictions herein provided. No body shall be cremated in any such crematory if the body is claimed and removed, within seven days after receipt of notice, by relatives or interested friends or by the authorities of the town responsible for the burial of such person, but any body may be cremated with the consent of such relatives, friends or town authorities.