1951 June 30, BB Marsh, Nature 167 — Letters to Nature: A Factor Modifying Muscle Fibre Synæresis, pages 1065–1066:IN an attempt to extend observations on the synæresis of actomyosin by adenosine triphosphate to a less disorganized and more physiologically complete system, the volume changes which accompany the disappearance of the latter in a muscle fibre suspension are being studied.