Science too proceeds by lantern-flashes; it explores nature’s inexhaustible mosiac piece by piece. Too often the wick lacks oil; the glass panes of the lantern may not be clean. No matter : his work is...

Permanence of instinct must go with permanence of form…The history of the present must teach us the history of the past.[Referring to studying fossil remains of the weevil, largely unchanged to the present day.]