310 I. I. Hayes 6n the Practicability 
breeding places are hence selected where instinct directs to open 
water. 
We are wanting in any connected series of observations be- 
yond a certain line which will give us conclusive results as to 
the climate about the Pole, but there are many isolated facts 
which point to considerable modification of temperature, as we 
pass beyond a point, not yet determined with positive, although 
within reasonable limits. If i e shown, as been as 
sumed, that a milder climate exists at the Pole than a few 
degrees farther to the south, it must be mainly owing to the in- 
- fluence of open water; if not permanent nor uniform, at least to 
a greater degree, and for a longer annual period, than further to 
the south, for an ‘icé covered sea would hs 
effect of a solid body of land. 
That a milder climate does exist at the Pole than a little far- 
ave all the frigorific 
