THERMOMETRICAL FALLACIES. 
347 
spiration and lassitude. This at a temperature of 
zero in the shade, and +11° in the sun!!! I can not 
realize it. To-day the thermometer gave +10° in the 
shade of the ship, obviously affected not a little by 
radiation, +34° in the sun over the ship’s painted 
side, +13° by my own observation of an instrument 
suspended at a distance from the ship, and under the 
same circumstances in the shade, zero! Yet the day 
seemed spring-like and delicious. The early breezes 
(8 A.M.) from the southeast came with a sensation of 
reviving coolness, although to their warmth we per- 
haps owed our sensations of pleasant heat. While I 
am writing, the skaters come in to say that ‘ it is too 
warm to skate: yet the sun is low, and my shade 
thermometer gives some ten degrees below the point 
of freezing. 
I have often alluded to this discrepancy between 
our feelings and the recorded temperature. I have 
read of the same thing in the Arctic voyages, with a 
reference to contrast for the explanation. But I never 
until to-day realized so fully that we were warmed 
from within by a mysterious, and, I must believe, un- 
known system of functional compensation. I wish 
Liebig could make a Polar voyage!! As you feel 
open- windowed at the first breaking-in day of Spring, 
with your thermometers at vernal 60°, so feel I with 
the thermometer at zero ! ! 
April 10, Thursday, 2 P.M. The southeaster 
blows on with steady endurance. It is now east by 
south; a snow-storm reminding me of home, so soft 
and flaky, drifting every where ; and the thermometer 
rising steadily to +32 at noonday. Once more at the 
freezing point ! ! it seems hard to realize. The decks 
are wet, the housing dripping, the snow adhesive and* 
slushy. 
