Forest physiography; physiography of the United States and principles of soils in relation to forestry . on as compared with a sta-tion hke Middletown, Connecticut, 20 miles inland. Southern species ofbirds and plants follow the Atlantic coast in narrowing belts surprisinglyfar toward the north. The northernmost occurrence of persimmon trees,a southern species, is at Lighthouse Point, Nev/ Haven. The temper-ature contrasts between the two coasts are shown in the following table. CONTRASTS BETWEEN ATLANTIC AND PACIFIC COAST TEMPERATURES^ Stations , Latitude AnnualMean WinterMean SummerMean Sava
Forest physiography; physiography of the United States and principles of soils in relation to forestry . on as compared with a sta-tion hke Middletown, Connecticut, 20 miles inland. Southern species ofbirds and plants follow the Atlantic coast in narrowing belts surprisinglyfar toward the north. The northernmost occurrence of persimmon trees,a southern species, is at Lighthouse Point, Nev/ Haven. The temper-ature contrasts between the two coasts are shown in the following table. CONTRASTS BETWEEN ATLANTIC AND PACIFIC COAST TEMPERATURES^ Stations , Latitude AnnualMean WinterMean SummerMean Savannah, Ga San Diego, Cal Cape May, N. J San Francisco, Nantucket, Mass Eureka, Cal Chatham, N. B 32° 532 43 38 5037 18 41 1740 48 47 346 17 66° 5456 4952 3950 52° 36 33 47 13 42 8i° 7259 6S56 6358 Fort Canby, Wash 1 R. DeC. Ward, CHmate, 1908, p. 28. 2 A. J. Henry, Climatology of the United States, Bull. Q, U. S. Weather Bureau, 1906,p. 26. The statistical data in the section on climate have been derived chiefly from this source. PHYSIOGRAPHIC, CLIMATIC, AND FOREST REGIONS 113. Fig. 14.—Temperature zones of the western hemisphere. (Ward, adapted from Koppen.) 114 FOREST PHYSIOGRAPHY It will be noted from the table that the winter means on the Atlanticcoast are regularly lower than those on the Pacific, since, being on theleeward side of the continent, continental influences are more stronglymarked than marine. The summer means are all higher for the samereason: the land is always warmer in summer and colder in winter thanthe sea. The greatest extremes of temperature are experienced in. the interiorof the country far from the influence of the oceans, where the continentaltype of climate prevails. The valleys of eastern Montana experience
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