DEVICES FOR ADMINISTERING ANESTHETIC AGENTS AND FOR VENTILATING MAMMALS-NAMELY, FOR USE WITH MEDICAL POSITIVE PHASE RESPIRATORS, MEDICAL POSITIVE NEGATIVE PHASE RESPIRATORS, MEDICAL AUTOMATIC LEAK-COMPENSATING RESPIRATORS, PHYSIOLOGICAL VOLUME LIMITING RESPIRATORS FOR INTENSIVE CARE, COMPLETE VOLUME LIMITING VENTILATORS FOR INTENSIVE CARE, ANESTHESIA VENTILATORS, PORTABLE RESPIRATORS, AUTOMATIC RESUSCITATORS AND EMERGENCY HAND RESUSCITATORS