#$%^&*AU2013234425A120150416.pdf#####29 ABSTRACT [0177] The present invention provides a cage rack system 10 comprising a shelf member 30 which is adapted to receive a cage 60 thereon, the shelf member 30 including a chimney portion 30.1, the shelf member 30 including duct means 30.6 to communicate a gas mixture from the chimney portion 30.1 to a lower front side of the cage 60 or wherein said gas mixture is deliverable to the cage 60 by means of a movable or rotatable conduit 30.7, 1030.7. Figure to be published: 11/33 /, 50.5 50.1 0.1 600
