Welsh Journals

will be 100 per cent complete, but with suitable photography there is less chance of areas being omitted. ACKNOWLEDGEMENT The author wishes to acknowledge the assistance of Professor C. Kidson and Mr. M. Manton of the Geography Department, University College of Wales, Aberystwyth, The Nature Conservancy, in particular Mr. P. Walters- Davies, and the West Wales Naturalists' Trust. REFERENCES BUXTON. J. & LOCKLEY. R. M. (1950). Island of Skomer. Staples Press, London. JONES. A. D. (1969). Aspects of comparative air photo-interpretation in the Dyfi Estuary. Photogrammetric Record 6, (35), 291-305. JONES. A. D. (1971). Film Emulsions. In The application of aerial photography to the work of the Nature Conservancy. Ed. R. Goodier, Nature Conservancy, Edinburgh. KODAK (1968). Kodak Aero-Neg Colour System. Eastman Kodak Co., Rochester, New York. Dept. of Geography, University College of Wales, Aberystwyth. Cemlyn Bird Observatory Residential Field Centre and Association MEMBER OF N.A.B.C. AFFILIATED TO BRITISH NATURALIST ASSOCIATION. A paradise for bird-watchers, the Observatory and Residential Field Study Centre is open all the year round. New luxury chalet accommodates up to 6, with adequate toilet arrangements. Chalet No 2 with outside toilet. Family bookings, short week-enders welcome. Organised field courses in Ornithology, Rural Science, Geology, etc., with attendant tutors. Accommodates up to 18 for School parties, etc. Good area for botanists and entomologists. Excellent spot for sea-watching, with good spring and autumn ducks and waders. Average of 60 different species can be seen every day; between 70 and 90 per month during peak migration, possibly more. Why not become a friend of Cemlyn Bird Observatory and Association? Ordinary members £ minimum, Junior naturalists 70p; Fellows £ 4, Family members £ 2. Members receive 7 newsletters annually, informing them what birds can be seen at Cemlyn. Write for further details to: D. H. Coggins, F.Z.S., M.B.O.U., Warden and Director of Centre, Cemlyn Bird Observatory, Cemlyn Bay, nr. Amlwch, Anglesey, LL67 ODU. Tel: Cemaes Bay 244 (S.A.E. please).