5. A bottle of compressed oxygen, with mouthpiece, should be kept at all times ready for use; and printed instructions as to the use of this bottle, and the method to be employed for resuscitation by means of artificial respiration should be kept constantly affixed. A draft of such instructions is appended. 6. A supply of suitable chemical respirators properly charged and in good condition should be kept ready for use in case of emergency arising from sulphuretted hydrogen or certain poisonous gases. (Granules of carbon saturated with a solution of caustic soda readily absorb sulphuretted hydrogen and may be used for charging respirators.) 7. The use of naked lights should be strictly prohibited in any portion of the works where gas of an inflammable nature is liable to be given off. 8. Each still should be provided with a proper safety valve, which should at all times be kept in efficient working condition. GASSING _Symptoms._—The first symptoms are giddiness, weakness in the legs, and palpitation of the heart. If a man feels these he should at once move into fresh warm air, when he will quickly recover if slightly affected. He should avoid exposure to cold. He should not walk home too soon after recovery; any exertion is harmful. _First Aid._—Remove the patient into fresh warm air. Send for the oxygen apparatus. Send for a doctor. Begin artificial breathing at once if the patient is insensible and continue it for at least half-an-hour, or until natural breathing returns. Give oxygen[J] at the same time and continue it after natural breathing returns. _Artificial Breathing_ (_Schäfer Method_).—Place the patient face downwards as shown in the diagrams. Kneel at the side of the patient and place your hands flat in the small of his back with thumbs nearly touching, and the fingers spread out on each side of the body over the lowest ribs (_see_ Diagram 1). [Illustration: DIAGRAM 1] Then promote artificial breathing by leaning forward over the patient and, without violence, produce a firm, steady, downward pressure (_see_ Diagram 2). Next release all pressure by swinging your body backwards without lifting your hands from the patient (_see_ Diagram 1). [Illustration: DIAGRAM 2] Repeat this pressure and relaxation of pressure without any marked pause between the movements, _about 15 times a minute_, until breathing is established. In my opinion as expressed in the general discussion, use of breathing apparatus (smoke helmets) with oxygen is strongly advisable; these implements must be put on before entering the still. In creosoting wood, opening the apparatus and taking out the steeped wood should only be done when the apparatus is sufficiently cooled, as otherwise injurious fumes escape.