The aviation pocket-book for 1918; a compendium of modern practice and a collection of useful notes, formulae, rules, tables and data relating to aeronautics (1918)
Matthews, Richard Borlase, 1878- · London : C. Lockwood and son · leaf 395
<0 ^ ?si o gging asjq -j l3^^ n33au39 30M3a3Jjia ¥o(f Prediction Chart. 252 METEOROLOGICAL DATA [div. IX … DIV. ix] TIME OF SUNSET 253 The chart opposite gives a diagrammatic representation of thetime of sunset and sunrise at Greenwich. The shaded area betweenthe curved lines indicates the portions of each day during the yearthroughout which darkness prevails. One hour after sunset andone hour before…
Aeronautics
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