PTE

OF THE DRIF

these have been widely accepted and taught in our schools as established truths, yet it is not too much to say th

ne aut

ed drift is a question which

after considering one o

ess our ignorance of this strange, this mysterious episode in the history of our globe. . . . Nevertheless, we repeat, no exp

ie s

ersuaded that till has ever forme

summing up all the facts and all t

Cyclop?dia," v