. The evolution of the earth and its inhabitants; a series delivered before the Yale chapter of the Sigma xi during the academic year 1916-1917. Fie. 32.—Climograph of France and Italy. Based on 3,700,000 deaths, 1899-1913. 60 Humidity 70 90 South Pacific Coast (1900-1912)142,000 deaths 60 60 S 509 9. 20 Deaths in Relation to Temperature and Humidity.(Graph for LOS Angeles) J 1 1 , • • _L FIG. 33.—Climograph of Southern California. Based on 142,000 deaths atSan Francisco, Sacramento, Los Angeles, and San Diego, 1900-1912. 162 EVOLUTION OF THE EARTH less than the normal. The less heavily shaded
. The evolution of the earth and its inhabitants; a series delivered before the Yale chapter of the Sigma xi during the academic year 1916-1917. Fie. 32.—Climograph of France and Italy. Based on 3,700,000 deaths, 1899-1913. 60 Humidity 70 90 South Pacific Coast (1900-1912)142,000 deaths 60 60 S 509 9. 20 Deaths in Relation to Temperature and Humidity.(Graph for LOS Angeles) J 1 1 , • • _L FIG. 33.—Climograph of Southern California. Based on 142,000 deaths atSan Francisco, Sacramento, Los Angeles, and San Diego, 1900-1912. 162 EVOLUTION OF THE EARTH less than the normal. The less heavily shaded area betweenthe 10 per cent line and the zero line means that on an averagethe deaths in months having any of the combinations of tem-perature and humidity falling between these lines range fromthe normal to not more than 10 per cent below it. The nextlighter strip indicates conditions under which deaths rangefrom normal to 10 per cent more than the normal, and so lighter the shading the greater the number of deaths, andthe less the vitality and energy. The practical use of thediagrams may be illustrated by an example. Suppose, forinstance, that we want to find what degree of health we mayexpect in a month having an average temperature of 50° fornight and day together and a mean
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