A BRITISH WARTIME CHART SHOWING HONG KONG
133
Lister, R. How to Identify old Maps and Globes (London, 1965) p. 222. Robinson, A. H. W. Marine Cartography in Britain (Leicester, 1962) p. 123, pp. 182-183.
3 The whole matter is extremely complicated. It is not possible to say with confidence whether the mathematical basis of the chart is Mercator's projection or a simple Plain Chart. The mean distance on the chart between 22°N and 23°N is 333.5 mm.
Cf. Encyclopaedia Britannica, 11th Edition, 1910, Vol. VIII, pages 802 and 810. United Nations, Department of Economic and Social Affairs. World Weights and Measures (New York, 1967) page 13.
Doursther, H. Dictionaire Universel des Poids et Measures (Brussels, 1940) page 279.
Chriss, M. and Hayes, G. R. An Introduction to Charts and Their Use (Glasgow, 1964) page 10.
1936.
Taylor, E. G. R. The Haven-Finding Art (London, 1956) Chapter 10.
4 For modern latitudes cf.
British Admiralty. Chart No. 2562, Canton River and Si Kiang Delta.
British Directorate of Overseas Surveys. Series 231, Sheet 13B, 1968. For navigational techniques cf. Taylor, op. cit.
5 Cf. The Principles of the International Phonetic Association (London, 1949) p. 10.