It must not be forgotten in this connection that his career was synchronous with the growth of a social revolution which, having reached its full force in these days, is making Russia over for better or for worse, and whose wellsprings Tolstoy helps us to fathom.
"Prophets of Dissent Essays on Maeterlinck, Strindberg, Nietzsche and Tolstoy"
Otto Heller
Galileo, while a student at Pisa, discovered, by observing the oscillations of the lamp suspended in the nave, that the vibrations of a pendulum are synchronous, or recur at equal intervals whether great or small.
"The South of France--East Half"
Charles Bertram Black
Of the uniformities which exist among synchronous phenomena, the most important, on every account, are the laws of number; and next to them those of space, or in other words, of extension and figure.
"A System Of Logic, Ratiocinative And Inductive (Vol. 1 of 2)"
John Stuart Mill