William Morris Davis,
The Harvard Classics Vol. 51
(1914)
“ The first reading ought to excite a desire to learn more about light; the second, to understand more fully the method of science; the third, to know more intimately some of the great men of the world. Thus the careful reading of one thing creates an appetite for reading many other things: and therein lies the greatest teaching value of any reading whatever. ”
William Morris Davis,
The Harvard Classics Vol. 51
(1914)
“ To discover the facts of inference and to demonstrate their connection with the facts of observation is the effort of all theorizing. A theory is, in brief, a statement in which the supposed facts of inference are reasonably connected with the known facts of observation. ”
William Morris Davis,
The Harvard Classics Vol. 51
(1914)
“ Or, some unseen factors must determine the strength of the tides and their hour of occurrence varying from day to day. How can light travel at its incredibly rapid velocity? How can the moon cause changes of sea level on the earth? The true answers to such questions would acquaint us with phenomena that, in spite of their invisibility, take place just as truly as the phenomena that we observe. Such unseen phenomena might be called "facts of inference," to distinguish them from "facts of observation." ”
