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Cork insulation; a complete illustrated textbook on cork insulation ...

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MEASUREMENT OF HEAT AND HUMIDITY 93<br />

the dew point and the amount of water vapor in the air<br />

(absolute humidity) from psychrometric tables published by<br />

the United States Department of Agriculture, Weather Bureau<br />

Bulletin No. 235*.<br />

Air that is saturated has a dew point and dry bulb and<br />

wet bulb temperatures that are identical ; and if such air is<br />

cooled, the volume will be c<strong>on</strong>tracted and some of the moist-<br />

ure will be c<strong>on</strong>densed. If air is but partly saturated, and the<br />

temperature is reduced, by removal of heat from such air, the<br />

dry bulb temperature falls and the wet bulb temperature falls<br />

until they finally reach the dew point temperature, at which<br />

point the air is <str<strong>on</strong>g>complete</str<strong>on</strong>g>ly saturated,<br />

RELATIVE HUMIDITIES IN VARIOUS CITIES.<br />

(U. S. Weather Reports.)<br />

Average Annual Humidities for Various Cities of United States.<br />

City 8 a. m. 8 p. m.<br />

Albany, N. Y.<br />

Asheville, N. C.<br />

Atlanta, Ga.<br />

Atlantic City, N. J.<br />

Augusta, Ga.<br />

Baltimore, Md.<br />

Bost<strong>on</strong>, Mass.<br />

Hartford. C<strong>on</strong>n.<br />

Jacks<strong>on</strong>ville, Fla.<br />

Key West, Fla.<br />

Mac<strong>on</strong>, Ga.<br />

New Haven, C<strong>on</strong>n.<br />

New York, N. Y.<br />

Norfolk, Va.<br />

Philadelphia, Pa.<br />

Portland, Me.<br />

Providence, R. I.<br />

Savannah, Ga.<br />

Washingt<strong>on</strong>, D. C.<br />

Wilmingt<strong>on</strong>, N. C.<br />

Birmingham, Ala.<br />

Galvest<strong>on</strong>, Texas<br />

Mobile, Ala.<br />

M<strong>on</strong>tgomery, Ala.<br />

New Orleans, La.<br />

Pensacola, Fla.<br />

San Ant<strong>on</strong>io, Texas<br />

Tampa, Fla<br />

Buffalo, N. Y.<br />

Chattanooga, Tenn.<br />

Chicago, 111.<br />

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