J. E.. Willet on Indian Summer. 341 
quantity burned in the north is very much greater than in the 
south, and the smoky tinge of winter was not observed, some 
other explanation than these burnings must be sought for. I 
have sometimes imagined that the lowering of the temperature 
in winter rendered the vapor in the upper current of air visible 
and imparted this hazy appearance.” 
ieut. J. M. Gilliss, in his very interesting work on Chili,* 
says, “ All through March, and the larger half of April, unex- 
ceptionably fine weather lasts, though the atmosphere is 1 
transparent by day than during the other seasons, and copious 
dews at night show its increasing relative humidity. About the 
of the former month, or in the first half of the latter, there 
are usually from ten to fifteen days when it assumes that pecu- 
T appearance between smoke and dry fog which is so notable 
asthe “Indian Summer” of North America. During its con- 
tinuance there is scarcely any wind; and, as the temperature 
ter noon rises to summer heat, with its fresh southerly breeze, 
the air is more enervating than at the latter season. Here the 
resemblance between the two hemispheres ceases. Unlike the 
North American “Indian Snmmer,” of which, its continuity 
Once broken, there is no return until the following year, the 
Chilain “verano de San Juan,”+ is often interrupted by a re- 
hewal of the periodic winds with greater force, or by clouds; 
and after a day or two, there succeeds another interval, when 
the air is tranquil and smoky.” _ : : 
- these extracts, we have evidence of Indian Summer in 
North America, Europe, Africa and South America. 
2. Moreover, the indications are, that Indian Summer is a 
Phenomenon of the temperate zone. 
have seen no allusions to it in the writings of travelers in 
arctic and tropical regions. : : 
we out seen ‘anes it is distinctly marked in the United 
States, in Middle Kurope, at Santiago 1n Chili, lat. 33 26’ 26 
Zone, but the remarks of Dr. Livingstone show its greater pre- 
fommanee in the temperate. os a a he amma every 
Winter at Kolobeng, (lat. 24° 3 ut it was m r 
in Londa” (in ane Gonye is situated) “as in the South,” and 
as conte U. S. Nayal Astronomical Expedition to the Southern Hemisphere, vol. i. 
3 pal 
+ St. John’s Summer. : 
