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154 REV. W. SERLE ON MIGRATION OF BIRDS. 
strange, and seemingly are only explainable by the influence 
of heredity, which, Seebohm declares, “has developed into 
something like a reasoning faculty which is generally right but 
occasionally wrong.” I should say, “rarely wrong.” Other 
matters affecting migration I have not touched, such as the 
influence of weather, the rate at which birds migrate, the 
various routes they take, questions of geology that are 
raised. I have confined myself to the Theory of Migration 
and traced the development of thought concerning a subject 
that puzzled thinkers of ancient days, and continues the 
wonder of the light-keepers on our rocky headlands, and 
of beings like myself who, under the midnight light of a 
gas jet, see nothing but think many things. 
PRESENTED 
