THE Royal Society of Edinburgh, in conjunction with the Royal Physical Society, the Edinburgh Geological Society, the Geological Society of Glasgow, and H.M. Geological Survey (Scotland), has appointed a committee to organise an appropriate commemoration of the 150th anniversary of the death of James Hutton, “the Father of Modern Geology”. Among other items it is proposed to erect a granite panel, suitably inscribed, at the site of Button's unmarked grave in Greyfriars Churchyard, Edinburgh. Subscriptions are invited to defray the cost of this memorial. Any sum in excess of the amount required will be applied towards the cost of a publication, which is at present under consideration. Subscriptions, not to exceed 5s., should be sent to the Treasurer, Royal Society of Edinburgh, 22 George Street, Edinburgh 2, for the James Hutton Memorial Fund.