Annual report of the Board of Regents of the Smithsonian Institution . 0 100 200 300 MILES Copyright, 1026, by the American. 1 Report. 1929.—Spinden It oroffrap/iiittl Svtuty of\t\rw Tbrk PLATE 1 The Geoyraphiral Rjevicy*. \:J$Z6. PI Vff CENTRAL AMERICARAINFALL MAP BY H J. SPINOEN SCALE1:9500 000 KILOMETERS 200 300. ^?Vjn^ht, 1326, hythcAmerUan OeoynifihUal SocirtyurjfewTork POPULATION OF ANCIENT AMERICA—SPINDEN 471 5. Fluctuations have been much more evident in humid lands,tropical or temperate, than in arid lands. 6. The greatest factor in depopulation has been disease in epidemicfo
Annual report of the Board of Regents of the Smithsonian Institution . 0 100 200 300 MILES Copyright, 1026, by the American. 1 Report. 1929.—Spinden It oroffrap/iiittl Svtuty of\t\rw Tbrk PLATE 1 The Geoyraphiral Rjevicy*. \:J$Z6. PI Vff CENTRAL AMERICARAINFALL MAP BY H J. SPINOEN SCALE1:9500 000 KILOMETERS 200 300. ^?Vjn^ht, 1326, hythcAmerUan OeoynifihUal SocirtyurjfewTork POPULATION OF ANCIENT AMERICA—SPINDEN 471 5. Fluctuations have been much more evident in humid lands,tropical or temperate, than in arid lands. 6. The greatest factor in depopulation has been disease in epidemicform. NOTE ON THE RAINFALL MAP In compiling this map use lias been made of official statistics where available(including the United States Weather Bureaus West Indian and CaribbeanService, Oliver L. Fassig in charge) and standard references such as HannsHandbuch der Klimatologie and Supans Die Verteilung des Niederschlags,Petermanns Mitt. Erganzungsheft No. 124, 1898. Also of the following: Alfred Merz: Beitrage zur Ivlimatologie und Hydrographie Mittelamerikas,Leipzig, 1907. M. W. Harrington: Central American Rainfall, Bull. Pliilos. Soc. Washington,Vol. 13,1895-1899, pp. 1-30, Washington, 1900. W. W. Reed: Climatological Data for Central America, Monthly Weather Rev.,Vol. 51, pp. 133-141, Washington, 1923. Paul H
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