Black and white photograph depicting a labour ward in a hospital, with two men in business suits standing on the left of the photograph next to an nitrous oxide machine. A woman patient is lying in a hospital bed on the right, wearing a hospital gown and holding the mouth-piece of the apparatus to her face. The two men are looking down at the equipment and the man on the left, Dr Kevin McCaul, is pointing at the patient, demonstrating the use of the demand flow nitrous oxide/oxygen apparatus. A lamp is above the bed and there are curtains behind the men on the left.•Handwritten on reverse in grey pencil: 1 [in a circle] •Printed stamp in blue ink on reverse: 51 4776 / PHOTOGRAPHED BY SPECIALIZED / PHOTOGRAPHIC / COMPANY PTY. LTD. / REF. No .................... 240 CHAPEL STREET / TAKE ........................ PRAHRAN, VICT., S1 / PHONE 51 4776 / 51 1752 •Handwritten in black ink on reverse: 4874 [next to REF. No] / D [next to TAKE]nitrous oxide apparatus, demand flow apparatus, kevin mccaul, anaesthetic equipment