title: An improved helmet for breathing oxygen or other gases.
authors.forename: J E
authors.initials: JE
authors.lastname: DUNCAN
mesh_terms: D019069:Cell Respiration; D005740:Gases; D006260:Head Protective Devices; D006801:Humans; D010100:Oxygen / Q000628:therapy*; D012119:Respiration
chemical_list: D005740:Gases; D010100:Oxygen