How signal a place does the imagination hold in the realm of science and invention! Reason itself is only an under-servant. It has no creative skill. Memory makes no discoveries. But the imagination is a wonder-worker. One day, chancing upon a large bone of the mammoth in the Black Forest, Oken, the German naturalist, exclaimed: "This is a part of a spinal column." The eyes of the scientist saw only one of the vertebræ, but to that one bone his imagination added frame, limb and head, then clothed the skeleton with skin, and saw the giant of animals moving through the forest. In that hour the imagination wrought a revolution in the science of anatomy. Similarly, this creative faculty in Göethe gave botany a new scientific basis. Sitting in his favorite seat near the castle of Heidelberg one day, the great poet was picking in pieces an oak leaf. Suddenly his imagination transformed the leaf. Under its touch the central stalk lifted itself up and became the trunk of the tree; the veins of the leaf were extended and became boughs and branches; each filament became a leaf and spray; the imagination revealed each petal and stamen and pistil, as after the leaf type, and gave a new philosophy to the science of herbs and shrubs. When a pistachio tree in Paris with only female blossoms suddenly bore nuts, the mind of a scientist suggested that some other rich man had imported a tree with male flowers, and careful search revealed that tree many miles away. And in every department of science this faculty bridges over chasms between discovered truths. Even Newton's discovery was the gift of imagination. When the eyes of the scientist saw the falling apple it was his vision faculty that leaped through space and saw the falling moon. When the western trade winds, blowing for weeks, had cast the drift wood upon the shores of Spain, Columbus' eyes fell not only upon the strange wood but also upon a pebble caught in the crevice. But his imagination leaped from the pebble to the Western continent of which the stone was a part, and from the tree to the forest in which it grew.