See also:

• ISABNORMAL (or ISANOMALOUS) LINES

ISABNORMAL (or ISANOMALOUS) LINES  , in See also:

• PHYSICAL

physical geo- graphy, lines upon a See also:

• MAP
• MAP (or MAPES), WALTER (d. c. 1208/9)

map or See also:

• CHART (from Lat. carta, charta, a map)

chart connecting places having an abnormal temperature . Each See also:

• PLACE (through Fr. from Lat. platea, street; Gr. IrAar6s, wide)

place has, theoretically, a proper temperature due to its See also:

• LATITUDE (Lat. latitudo, latus, broad)

latitude, and modified by its configuration . Its mean temperature for a particular See also:

• PERIOD
• PERIOD (Gr. irepioSos, a going or way round, circuit, aepi, round, and &Sis, way, road)

period is decided by observation and called its normal temperature . See also:

• ISABNORMAL (or ISANOMALOUS) LINES

Isabnormal lines may be used to denote the See also:

• VARIATIONS
• VARIATIONS, CALCULUS
• VARIATIONS, CALCULUS OF

variations due to warm winds or currents, See also:

• GREAT

great altitudes or depressions, or great See also:

• LAND

land masses as compared with See also:

• SEA (in O. Eng. sae, a common Teutonic word; cf. Ger. See, Dutch Zee, &c.; the ultimate source is uncertain)
• SEA, COMMAND OF THE

sea . Or they may be used to indicate the abnormal result of See also:

• WEATHER (O. Eng. weder; the word is common to Teutonic languages; cf. Du. weder, Dan. veir, Icel. ve8r, and Ger. Wetter and Gewitter, storm; the root is wa- to blow, from which is derived " wind ")

weather observations made in an See also:

• AREA

area such as the See also:

• BRITISH

British Isles for a particular period .