210 J. Orton on the Andes and Amazons. 
‘The extreme range decreases with the latitude and also 
_ the increase of altitude 
ar "30 « (Wallace. 
. Rania ° et S. « 166 “ (Orton.) 
* Qu ° 18'S. *- 180% (Orton 
“ Antisana Hacienda,0°30'S. “ +065 (Aguirre.) 
The diurnal variation decreases with the increase of alt 
as well as with the increase of latitude: 
Increase of elevation— 
Guayaquil, alt, 10 ft. var. *091 
Para. a 1...* 088 i 
Quito, 6 9500 4 ae 
Antisana, a 23200 > 022 (Aguirre. 
345 “ 
Anomalous, Pebas, “ 104 
- Mandos, “ 120 “ +111 (Spruce) « 
Increase of latitude— : 
Guayaquil lat, 2° 12'S, var. 0 
: “'g3. 66°R." 060 (ompatet hy 
Poe SNe 
Arctic Sea, “, 72°15'N,. « 088 (Sonntag) 
“ 
018 
: “sis N. 8 en & 
Increase of altitude with increase of latitude— 
Paris, lat. 48°50’ alt, 200 ft. var, 0815 
Geneva, “ 46° 192’ “« $350 * “+0354 
ov Jan; Ss 
Antisan J 
Throughout Asia the emegre mean is 
in winter; in Para, Antisana and Sitka it is ‘the pen 
ge variation ‘decreases from the poles to @ | 
40° ; thence to the equator it increases. At the eq™ 
know sive how it is in high latitudes) it decreases W! 
titu 
The annual range at Port Foulke (0°41 * ) is about 
the diurnal ; oe of Antisana (0:05) is bout twice | 
nal, ual variation is more cide marked 
pon: in tropical America, This is , says es 
ee wind ehroaghens the hi ge 
World; whil equatorial risa Be - 
sun’s altitude i is pli and polar current ve 
