See also:

• AIR (from an Indo-European root meaning " breathe," " blow ")
• AIR, or ASBEN

AIR (from an Indo-See also:

• EUROPEAN

European See also:

• ROOT (late O.E. rot, adopted from Scand., cf. Norw. and Swed. rot, Dan. rod; the true O.E. word was wyrt, plant, represented in Ger. Wurz or Wurzel; the ultimate root is the same in both words, and is seen in Lat. radix)
• ROOT, ELIHU (1845– )

root meaning " breathe," " See also:

• BLOW, JOHN (1648-1708)

blow ")  , the See also:

• ATMOSPHERE (Gr. fir µ6r, vapour; orkaipa, a sphere)

atmosphere that surrounds the See also:

• EARTH
• EARTH (a word common to Teutonic languages, cf. Ger. Erde, Dutch aarde, Swed. and Dan. jord; outside Teutonic it appears only in the Gr. 'pq'e, on the ground; it has been connected by some etymologists with the Aryan root ar-, to plough, which is seen in
• EARTH, FIGURE OF
• EARTH, FIGURE OF THE

earth; Gr . 6.6, the See also:

• LOWER

lower thick See also:

• AIR (from an Indo-European root meaning " breathe," " blow ")
• AIR, or ASBEN

air, being distinguished from- See also:

• ALE

ale* p, the upper pure air . ' With the development of See also:

• ANALYTICAL

analytical and especially of pneumatic See also:

• CHEMISTRY
• CHEMISTRY (formerly "chymistry"; Gr. xvµela; for derivation see ALCHEMY)

chemistry, the air was recognized not to be one homogeneous substance, as was See also:

• LONG, GEORGE (1800-1879)
• LONG, JOHN DAVIS (1838– )

long supposed, and different " airs," or gases, came to be distinguished . Thus See also:

• OXYGEN (symbol 0, atomic weight 16)

oxygen See also:

• GAS

gas, at the end of the 18th See also:

• CENTURY (from Lat. centuria, a division of a hundred men)

century, was known as dephlogisticated air, See also:

• NITROGEN [symbol N., atomic weight 14.01, 0=16]

nitrogen or azote as phlogisticated air, See also:

• HYDROGEN [symbol H, atomic weight x-oo8 (0=16)]

hydrogen as inflammable air, carbonic See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid gas as fixed air . The name is now ordinarily restricted to what is more accurately called atmospheric air—the air we breathe—the invisible elastic fluid which surrounds the earth (see ATMOSPHERE) . Probably the sense of atmosphere or environment led (though this is disputed by etymologists) to the further use of the word " air " to mean " manner " Or " See also:

• APPEARANCE (from Lat. apparere, to appear)

appearance "; and so to its employment (cf .