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Davies W. K. D. and Thompson R. R. (1980) The structure of interurban connectivity: a dyadic factor analysis of Prairie commodity flows, Reg. Studies 14, 297-311. No single model can summarize the structure of connectivity in an urban system. Instead, a series of linkage types and network structures are proposed as being alternative patterns in urban systems. The dyadic factor analysis approach is used to integrate the flow patterns of 15 different commodity types between the largest cities in the prairie provinces. Three very different types of connectivity are identified accounting for two thirds of the variation in the data set. Each is associated with a distinctive set of commodities and bears a close relationship to one of the postulated network structures.

Davies W. K. D. and Musson T. C. (1978) Spatial patterns of commuting in South Wales, 1951-1971: a factor analysis definition, Reg. Studies12, 353-366. Data from the 1951 and 1971 Censuses are used to examine the changing patterns of journey to work in South Wales. Although total employment has grown only slightly, the volume of commuting has increased substantially. The spatial pattern of commuting flows in the region is complex, and is inadequately expressed by previous studies which have produced conflicting results. Since they have stressed the nodality of a small number of employment centres or sought to identify self-contained labour market areas they impose a structure on the region. In view of these problems Higher Order Factor Analysis is employed to define regions at successive levels of generalisation, highlighting the nesting and overlap of the functional regions based on journey to work flows.

A method for functional regionalization based on higher-order factor analysis is proposed. The utility of the method when using alternative factorial procedures is described by reference to a study of journey-to-work flows in South Wales in 1971, in which the stability of the results under alternative factorial procedures is explored. The advantages of the higher-order factorial approach compared with previously suggested methodologies are documented.

Davies W. K. D. (1972) Conurbation and city-region in an administrative borderland: A case study of the Greater Swansea area, Reg. Studies6, 217-236. The paper explores the relationship between the urban structure of the Greater Swansea area and the recent series of local government boundary proposals. Although a coastal conurbation can be recognized in land use terms, a factor analysis of the economic structure and interaction patterns makes it more appropriate to regard it as the core of a city-region in which the interior coalfield communities act as a periphery. Despite this spatial integration, the area can still be characterized as an administrative borderland in regional terms and it is argued that this is a consequence of an ineffective political tradition as well as the ineffectiveness of recent government re-organization proposals.

GREAT BRITAINPatterns of Highland Development. By David Turnock, 8.9 × 6.3, xiii + 272 pages, 32 figures, 32 plates. Macmillan, London, 1970. £8.Soil Survey of Scotland, Bulletin No. 1: The Soils of Candacraig and Glenbuchat. By R. E. F. Heslop and C. J. Brown. 9 1/2 × 6, 116 pp., 13 tables, 3 maps (2 loose, folded), appendices, references, Index. Macaulay Institute for Soil Research, Aberdeen, 1969.Southwest England. By A. H. Shorter, W. L. D. Ravenhill and K. J. Gregory. 15.5 × 23.5 cm. xii + 340 pp., 95 maps and diagrams, 3 tables, 55 plates, 1 folded map, selected references, index. Nelson, London, 1969. £5.25.Land and Leisure. By J. Allan Patmore. 8 3/4 × 5 3/4, 322 pp., 26 plates, 84 illustrations and maps. David and Charles, Newton Abbot, 1970. £4.20.PHYSICAL GEOGRAPHYThe Value of Weather. By W. J. Maunder. 9×5 3/4, 388 pp. Methuen, London. £3.75; also University Paperback. £2.00.The Periglacial Environment. By Troy L. Péivé. McGill-Queen's University Press, 1969. £11.25.Glacier Surveys in British Columbia: Vol. 1 English System; Vol. 2 Metric System. By I. A. Reid and J. Shastal. Department of Energy, Mines and Resources, Canada, Report series No. 10. 1968.Coasts and Beaches. By J. A. Steers. 7×4 1/2. 136 pp. Illustrated. (Contemporary Science Paperback). Oliver & Boyd,. Edinburgh, 1969. 37 1/2p.HUMAN GEOGRAPHYUrban Analysis. A Study of City Structure with Special Reference to Sunderland. By B. T. Robson. Cambridge Geographical Studies, No. 1. 9 1/4 × 6 1/4. 302 pp. Maps and Tables. Bibliography. Cambridge U.P., London, 1969. £4.00The Harsh Lands. By David Grieg. 8 3/4 × 5 3/4, 321 pp., 24 figures, 30 tables. Macmillan, London, 1970. £3.50. Paperback, £1.75.ATLASES AND MAPSThe National Atlas of Disease Mortality in the United Kingdom. Revised and extended edition. By G. Melvyn Howe on behalf of the Royal Geographical Society. 11 1/4 × 8 3/4, 197 pp. Nelson, London. £5.25.Maps for Books and Theses. By A. G. Hodgkiss. 8 3/4 × 5 1/2, 267 pp., 8 plates, 88 illustrations. David & Charles, Newton Abbot, 1970. £2.75.EDUCATIONLandscape Studies - An Introduction to Geomorphology. By K. E. Sawyer. 10 3/4 × 8 1/2, x + 148 pp., 28 map extracts, 52 photographs, 124 field sketches, sketches, diagrams. Edward Arnold, London, 1970. £200.Water for Power and Irrigation. By J. M. Pritchard. 9 3/4 × 6, 36 pp., 18 maps, diagrams. Dent, London, 1970. 30p.Britain and World Trade. C. W. Park. 8 1/2 × 5 1/2, 176 pp., 46 diagrams and maps, 10 plates, tables, index. English Universities Press, London. 65p.Ethiopia in Pictures. By Alfred Allotey Acquaye. Iraq in pictures. By Jon A. Teta. Visual , Geography Series. 10i x 6|, 64 pp. The Oak Tree Press Ltd., 1970. 95p.World Population and Food Supply. J. H. Lowry. 9 3/4 × 7 3/8, 112 pp., charts, tables, diagrams, maps, plates. E. Arnold & Sons Ltd. 1970. £1.00.Landscape Studies Series. (7 titles). Edited by W. K. Birrell. 7 × 9 1/2. approx. 50 pp. Jacaranda Press, 1969. 49p.each.Jackdaw Publications. No. 76 Volcanoes, by G. Jefferies. No. 77 The Motor Industry by G. Jefferies. No. 79 Dairy Farming by J. L. Jones. Folder 9 × 13 1/2. Jonathan Cape, 1969. 60p.each.Field Studies for Schools. Volume 4. Field Excursions in North Wales. Edited by F. E. Clegg. 7 1/4 × 4 1/4, 174 pp., 8 plates, 25 maps and diagrams. Rivingtons, London, 1969. 90p.Field Studies for Schools. Volume 3. Field Excursions in Eastern Scotland. Edited by R. B.. Salmon. 7 1/4 × 4 3/4, 8 plates, 18 maps and diagrams. Rivingtons, London, 1969. 90p.Modern Geography Series, Book VIII, Africa: By A. W. Coysh and M. E. Tomlinson. 7 3/4 × 5 1/4, 226 pp., plates, maps and diagrams. University Tutorial Press, London, 1970. 67 1/2p.Mauritius: A Geographical Survey. By T. Ramdin. 9 3/4 × 7 1/2. 64 pp. 7 full page maps in colour. Many photographs and sketch-maps. Examination questions and bibliography. University Tutorial Press, London, 1969. 45p.New Secondary Geographies: 'Asia and North America'. By R. A. Beddis. 192 pp., 6 3/8 × 8 3/8 University of London Press. 90p.Focal Points in Geography: 'Asia and North America'. By R. A. Beddis. 9 3/4 × 7 3/8, 80 pp. University of London Press. 65p.Europe in Maps. By R. Knowles and P. W. R. Stowe. 96 pp., 19 maps, 22 photographs, 23 figures. Longmans, London, 1969. £1.50.Yorkshire and North Lincolnshire. By H. Tolley and K. Orrell. 9 3/4 × 7 1/2. 96 pp., 94 figs. Geography of the British Isles Series. Cambridge U.P., London, 1970.65p.Basic Geography. By D. C. Money. 10 × 7 1/2, 162 pp. University Tutorial Press, London, 1970. £1.10.The Earth's Surface. By D. C. Money. 7 1/2 × 10, 168 pp. Evans Bros., London, 1970. £1.25. These two books by Mr. Money overlap in subject matter but the scope and treatment are rather different.

The unusual distributional features of the recent foot and mouth epidemic suggest that there were several outbreak centres. The critical period in the outbreak was between the twenty-third and thirty-fifth days when the maximum number of daily outbreaks was recorded, and the epidemic reached its greatest spatial extent. Efforts to contain the disease may have been aided by the two ridges of high pressure present in the area in the week following November 17, 1967.